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Emerging Role of 2D Materials in Photovoltaics:Efficiency Enhancement and Future Perspectives 认领 引用 被引量：3
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作者 Ghulam Dastgeer Muhammad Wajid Zulfiqar +7 位作者 Sobia Nisar Rimsha Zulfiqar Muhammad Imran Swagata Panchanan Subhajit Dutta Kamran Akbar Alberto Vomiero Zhiming Wang 《Nano-Micro Letters》 SCIE EI CAS CSCD 2026年第1期843-895,共53页
The growing global energy demand and worsening climate change highlight the urgent need for clean,efficient and sustainable energy solutions.Among emerging technologies,atomically thin two-dimensional(2D)materials off... The growing global energy demand and worsening climate change highlight the urgent need for clean,efficient and sustainable energy solutions.Among emerging technologies,atomically thin two-dimensional(2D)materials offer unique advantages in photovoltaics due to their tunable optoelectronic properties,high surface area and efficient charge transport capabilities.This review explores recent progress in photovoltaics incorporating 2D materials,focusing on their application as hole and electron transport layers to optimize bandgap alignment,enhance carrier mobility and improve chemical stability.A comprehensive analysis is presented on perovskite solar cells utilizing 2D materials,with a particular focus on strategies to enhance crystallization,passivate defects and improve overall cell efficiency.Additionally,the application of 2D materials in organic solar cells is examined,particularly for reducing recombination losses and enhancing charge extraction through work function modification.Their impact on dye-sensitized solar cells,including catalytic activity and counter electrode performance,is also explored.Finally,the review outlines key challenges,material limitations and performance metrics,offering insight into the future development of nextgeneration photovoltaic devices encouraged by 2D materials. 展开更多
关键词 2D materials Photovoltaics Interface engineering Work function tuning Energy harvesting
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Quasi-periodic optical key-enabled hybrid cryptography:merging diffractive physics and deep learning for high-dimensional security 认领 引用
2
作者 Yu Shao Haiqi Gao +6 位作者 Jiaming Liang Xuehui Wang Junren Wen Yuchuan Shao Yueguang Zhang Weidong Shen Chenying Yang 《Advanced Photonics Nexus》 CSCD 2026年第3期176-185,共10页
Optical encryption inherently provides strong security advantages,with hybrid optoelectronic systems offering additional degrees of freedom by integrating optical and algorithmic domains.However,existing optical encry... Optical encryption inherently provides strong security advantages,with hybrid optoelectronic systems offering additional degrees of freedom by integrating optical and algorithmic domains.However,existing optical encryption schemes heavily rely on electronic computation,limiting overall efficiency,and the physical keys are susceptible to damage,compromising both security and system stability.To overcome these challenges,we introduce the quasi-periodic optical key(Q-POK),which combines longrange order with short-range disorder,enabling enhanced security and robustness against damage within a single platform.By leveraging diffraction symmetry,our design enables optics-driven encryption,effectively shifting the optoelectronic balance toward photonic processing.Moreover,we innovatively apply deep learning to reconstruct the complex optical ciphertext field using only amplitude data and cryptographic keys,simultaneously achieving data compression and improved security.Within this framework,the key space includes continuously tunable parameters such as wavelength,propagation distance,phase modulation,and Q-POK geometry,significantly expanding cryptographic diversity.Our system also demonstrates robust cryptographic reliability by reducing inter-class distances by over 50% and tolerating up to 20% ciphertext loss.Our framework represents a generation of physically grounded,algorithmically enhanced optical cryptosystems—laying a foundational pathway for scalable,hardware-integrated information security paradigms. 展开更多
关键词 optical encryption diffraction deep learning cryptographic key hybrid optoelectronic architecture
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The Thickness Dependence of Optical Constants of Ultrathin Iron Films 认领 引用 被引量：3
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作者 GAO Shang LIAN Jie +3 位作者 SUN Xiao-Fen WANG Xiao LI Ping LI Qing-Hao 《Chinese Physics Letters》 SCIE EI CAS CSCD 2013年第2期206-209,共4页
Ultrathin iron films with different thicknesses from 7.1 to 51.7 nm are deposited by magnetron sputtering and covered by tantalum layers protecting them from being oxidized.These ultrathin iron films are studied by sp... Ultrathin iron films with different thicknesses from 7.1 to 51.7 nm are deposited by magnetron sputtering and covered by tantalum layers protecting them from being oxidized.These ultrathin iron films are studied by spectroscopic ellipsometry and transmittance measurement.An extra tantalum film is deposited under the same sputtering conditions and its optical constants and film thickness are obtained by a combination of ellipsometry and transmission measurement.After introducing these obtained optical constants and film thickness into the tantalum-iron film,the optical constants and film thicknesses of ultrathin iron films with different thicknesses are obtained.The results show that combining ellipsometry and transmission measurement improves the uniqueness of the obtained film thickness.The optical constants of ultrathin iron films depend strongly on film thicknesses.There is a broad absorption peak at about 370 nm and it shifts to 410 nm with film thickness decreasing. 展开更多
关键词 measurement. film constants
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Numerical Simulation of Bell Inequality's Violation Using Optical Transverse Modes in Multimode Waveguides 认领 引用 被引量：5
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作者 符建 高淑娟 《Chinese Physics Letters》 SCIE EI CAS 2008年第7期2350-2353,共4页
We numerically demonstrate that ＇mode-entangled states＇ based on the transverse modes of classical optical fields in multimode waveguides violate Bell＇s inequality. Numerically simulating the correlation measuremen... We numerically demonstrate that ＇mode-entangled states＇ based on the transverse modes of classical optical fields in multimode waveguides violate Bell＇s inequality. Numerically simulating the correlation measurement scheme of Bell＇s inequality, we obtain the normalized correlation functions of the intensity fluctuations for the two entangled classical fields. By using the correlation functions, the maximum violations of Bell＇s inequality are obtained. This implies that the two classical fields in the mode-entangled states, although spatially separated, present a nonlocal correlation. 展开更多
关键词 BEAM-PROPAGATION METHOD QUANTUMLIKE FIELDS PHOTON MEDIA
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Transverse Multimode Evolution in Non-Adiabatic Optical Micro/Nanofiber Tapers 认领 引用 被引量：1
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作者 符建 徐颖颖 +2 位作者 唐少芳 李阳 孙硕 《Chinese Physics Letters》 SCIE EI CAS 2010年第1期124-127,共4页
The multimode evolution, optical losses and wavelength response of non-adiabatic microano-fiber （MNF） tapers are numerically simulated using a three-dimensional finite-difference beam propagation method. For a non-a... The multimode evolution, optical losses and wavelength response of non-adiabatic microano-fiber （MNF） tapers are numerically simulated using a three-dimensional finite-difference beam propagation method. For a non-adiabatic MNF taper, it is illustrated that optical losses vary with the transition region length and the optical wavelength. We explain how the complicated multimode evolutions result in the complicated optical loss and wavelength response properties, especially when the waist diameters are large enough to allow much higher-order modes. These results may offer valuable references for trapping and guiding cold atoms in atom optics and practical application of microano-devices. 展开更多
关键词 Chinese climate network complex systems small world community
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Near-Field Characterization of Optical Micro/Nanofibres 认领 引用 被引量：1
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作者 马哲 王姗姗 +1 位作者 杨青 童利民 《Chinese Physics Letters》 SCIE EI CAS 2007年第10期3006-3008,共3页
Near-field scanning optical microscopy is used to investigate the waveguiding properties of optical microanofibres （MNFs） by means of detecting optical power carried by evanescent waves. Taper drawn silica and tellu... Near-field scanning optical microscopy is used to investigate the waveguiding properties of optical microanofibres （MNFs） by means of detecting optical power carried by evanescent waves. Taper drawn silica and tellurite MNFs, supported on low-index substrates, are used to guide a 532-nm-wavelength light beam for the test. Modification of the single-mode condition of the MNF in the presence of a substrate is observed. Spatial modulation of the longitudinal field intensity （with a 195-nm period） near the output end of a 760-nm-diameter silica MNF is well resolved. Energy exchange through evanescent coupling between two parallel MNFs is also investigated. 展开更多
关键词 SUBWAVELENGTH PHOTONICS INTEGRATION CHANNEL WAVE-GUIDES SILICA NANOWIRES DIAMETER SILICA MICROSCOPY
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Properties of Controllable Soliton Switching in Optical Lattices with Longitudinal Exponential-Asymptotic Modulation 认领 引用 被引量：1
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作者 ZHOU Jun XUE Chun-Hua +1 位作者 QI Yi-Hong LOU Sen-Yue 《Communications in Theoretical Physics》 SCIE CAS 2008年第8期497-500,共4页
The properties of controllable soliton switching in Kerr-type optical lattices with different modulation are investigated theoretically and simulated numerically.The results show that the optical lattices can be avail... The properties of controllable soliton switching in Kerr-type optical lattices with different modulation are investigated theoretically and simulated numerically.The results show that the optical lattices can be available for all- optical soliton switching through utilization for length-scale competition effects.And through longitudinal exponential- asymptotic modulation for the linear refractive index,the properties of soliton switching in the optical lattices can be improved.The number of output channels of soliton switching can be controlled by the parameters such as incident angle,asymptotic rate of longitudinal modulation,guiding parameter and form factor. 展开更多
关键词 nonlinear Schrodinger equation optical lattices soliton switching
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Design of a Surface-Plasmon-Resonance Sensor Based on a Microstructured Optical Fiber with Annular-Shaped Holes 认领 引用
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作者 祝远锋 陈明阳 +2 位作者 王华 张永康 杨继昌 《Plasma Science and Technology》 SCIE EI CAS CSCD 2014年第9期867-872,共6页
A novel design is proposed for highly sensitive surface-plasmon-resonance sensors. The sensor is based on a microstructured optical fiber with two layers of annular-shaped holes. A gold layer is deposited on the inner... A novel design is proposed for highly sensitive surface-plasmon-resonance sensors. The sensor is based on a microstructured optical fiber with two layers of annular-shaped holes. A gold layer is deposited on the inner surface of the second hole-layer, in which the holes have several micrometers thickness in size, facilitating analyte infiltration and metal layer deposition. In the first layer of holes, the sector-ring^shaped arms, used as supporting strips, are utilized to tune the resonance depth of the sensor. Numerical results indicate that the sensor operation wavelength can be tuned across the C＋L-band. The spectral sensitivity of 1.0.104 nm. RIU-1 order of magnitude and a detection limit of 1.0.10-4 RIU order are demonstrated over a wide range of analyte refractive index from 1.320 to 1.335. 展开更多
关键词 microstructured optical fiber surface-plasmon-resonance spectral sensitivity
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Application of longitudinal generalized magneto-optical ellipsometry in magnetic ultrathin films 认领 引用
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作者 王晓 连洁 +6 位作者 张福军 高尚 陈延学 于晓红 李萍 王英顺 孙兆宗 《Chinese Physics B》 SCIE EI CAS CSCD 2014年第1期417-422,共6页
The longitudinal generalized magneto-optical ellipsometry （GME） method is extended to the measurement of three- layer ultrathin magnetic films. In this work, the theory of the reflection matrix is introduced into th... The longitudinal generalized magneto-optical ellipsometry （GME） method is extended to the measurement of three- layer ultrathin magnetic films. In this work, the theory of the reflection matrix is introduced into the GME measurement to obtain the reflective matrix parameters of ultrathin multilayer magnetic films with different thicknesses. After that, a spectroscopic ellipsometry is used to determine the optical parameter and the thickness of every layer of these samples, then the magneto-optical coupling constant of the multilayer magnetic ultrathin film can be obtained. After measurements of a series of ultrathin Fe films, the results show that the magneto-optical coupling constant Q is independent of the thickness of the magnetic film. The magneto-optical Kerr rotations and ellipticity are measured to confirm the validity of this experiment. Combined with the optical constants and the Q constant, the Kerr rotations and ellipticity are calculated in theory. The results show that the theoretical curve fits very well with the experimental data. 展开更多
关键词 generalized magneto-optical ellimpsometry magneto-optical coupling constant
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Electron-related nonlinear optical properties of cylindrical quantum dot with the Rosen-Morse axial potential 认领 引用
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作者 F Ungan M K Bahar +1 位作者 S Pal M E Mora-Ramos 《Communications in Theoretical Physics》 SCIE CAS CSCD 2020年第7期104-110,共7页
We present a theoretical study on the effects of intense laser field(ILF)and static electric field on the linear and nonlinear optical properties of a cylindrical quantum dot with Rosen-Morse axial potential under the... We present a theoretical study on the effects of intense laser field(ILF)and static electric field on the linear and nonlinear optical properties of a cylindrical quantum dot with Rosen-Morse axial potential under the framework of effective mass and parabolic band approximations.This study also takes into account the effects of the structure parameters(η,V1,and R).The analytical expressions of the linear,third-order nonlinear and total optical absorption coefficients(TOACs)and the relative refractive index changes(RRICs)are obtained by using the compact-densitymatrix approach.The results of numerical calculations show that the resonant peak position of the TOACs and RRICs shifts towards lower energies and the magnitude of the peak increases with the effect of the static electric field and ILF.In addition,it is observed that while the resonant energies of the TOACs and RRICs of system shift towards the higher(lower)energies with the enhancement ofη,V1,they decrease with the augmentation of R.Thus,the findings of this study show that the optical properties of the structure can be adjusted by changing the magnitude of structure parameters and applied external fields. 展开更多
关键词 cylindrical quantum dot nonlinear optical response intense laser field electric field
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Hyperbolic Plasmons in Coupled Luttinger Liquids of Homochiral Carbon Nanotube Arrays 认领 引用
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作者 Saiqun Ma Jiajun Chen +17 位作者 Cheng Hu Kunqi Xu Yufeng Xie Xingdong Luo Zhenghan Wu Yi Chen Xianliang Zhou Shuo Lou Bosai Lyu Peiyue Shen Zhichun Zhang Aolin Deng Chengjia Zhang Qi Liang Ming Tian Neng Wan Ji-Hun Kang Zhiwen Shi 《Chinese Physics Letters》 SCIE EI CAS CSCD 2025年第9期224-245,共22页
A Luttinger liquid is a theoretical model describing interacting electrons in one-dimensional(1D)conductors.While individual 1D conductors have shown interesting Luttinger-liquid behaviors such as spin-charge separati... A Luttinger liquid is a theoretical model describing interacting electrons in one-dimensional(1D)conductors.While individual 1D conductors have shown interesting Luttinger-liquid behaviors such as spin-charge separation and power-law spectral density,the more interesting phenomena predicted in coupled Luttinger liquids of neighboring 1D conductors have been rarely observed due to the difficulty in creating such structures.Recently,we have successfully grown close-packed carbon nanotube(CNT)arrays with uniform chirality,providing an ideal material system for studying the coupled Luttinger liquids.Here,we report on the observation of tunable hyperbolic plasmons in the coupled Luttinger liquids of CNT arrays using scanning near-field optical microscopy.These hyperbolic plasmons,resulting from the conductivity anisotropy in the CNT array,exhibit strong spatial confinement,in situ tunability,and a wide spectral range.Despite their hyperbolic wavefronts,the plasmon propagation in the axial direction still adheres to the Luttinger-liquid theory.Our work not only demonstrates a fascinating phenomenon in coupled Luttinger liquids for fundamental physics exploration,but also provides a highly confined and in situ tunable hyperbolic plasmon in close-packed CNT arrays for future nanophotonic devices and circuits. 展开更多
关键词 interacting electrons carbon nanotube arrays hyperbolic plasmons luttinger liquid scanning near field optical microscopy d conductors carbon nanotube cnt arrays coupled Luttinger liquids
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Optimum Optical Length of the Gas Cell Used for Monitoring Gas-In-Oil with FTIR 认领 引用 被引量：1
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作者 刘先勇 黄风雷 +1 位作者 王霞 周方洁 《Journal of Beijing Institute of Technology》 EI CAS 2003年第1期59-63,共5页
Dedicated experiments are designed to collect the infrared spectra of dissolved gas-in-oil of power transformers. Spectra of diagnostic gases are collected by 3 different laboratorial FTIR spectrometers using 3 differ... Dedicated experiments are designed to collect the infrared spectra of dissolved gas-in-oil of power transformers. Spectra of diagnostic gases are collected by 3 different laboratorial FTIR spectrometers using 3 different gas cells with various sets of equipment parameters. A formula is deduced to calculate the shortest optical length to detect a specific concentration according to measurements on gases with known concentrations near to the minimum detection limit. Collected spectra and calculated results suggested that the optimum optical length of the gas cell should be 150 mm to realize on-line monitoring of diagnostic gases within the required concentration range. At the end, an economic novel design of the gas cell is proposed based on the optimum length. 展开更多
关键词 FTIR gas cell power transformer DGA optical length dissolved gas-in-oil
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Superchirality induced ultrasensitive chiral detection in high-Q optical cavities 认领 引用 被引量：3
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作者 Tianxu Jia Youngsun Jeon +4 位作者 Lv Feng Hongyoon Kim Bingjue Li Guanghao Rui Junsuk Rho 《Opto-Electronic Advances》 SCIE EI CAS CSCD 2025年第10期15-28,共14页
The scale mismatch between nanoscale biomolecules and sub-wavelength light hinders circular dichroism(CD)spectroscopy for chiral small molecule sensing.In this study,we propose a high quality-factor(Q-factor)optical c... The scale mismatch between nanoscale biomolecules and sub-wavelength light hinders circular dichroism(CD)spectroscopy for chiral small molecule sensing.In this study,we propose a high quality-factor(Q-factor)optical cavity that offers a breakthrough solution to the intrinsic trade-off between optical chirality density and mode loss.A spin-preserving chiral metasurface utilizes bound states in the continuum(BIC)-guided mode resonance(GMR)degenerate modes to achieve a high Q-factor,while ensuring the preservation of chirality purity for circularly polarized light propagating within the cavity via spin-locking mechanism.Experimental results demonstrate that the BIC-GMR degenerate state enables near-perfect transmission CD up to 0.99,without requiring symmetry breaking.Full-wave simulations further predict that this synergistically enhanced system can achieve a Q-factor as high as 10037 and generate a localized field in the molecular interaction region with an optical chirality density enhancement of up to 400-fold,leading to 5025-fold amplification of the CD signal.This study establishes a foundation for detecting low-concentration chiral molecules,reveals high-Q enhancement,and advances chiral toward single-molecule sensitivity,opening new research avenues in chiral biosensing. 展开更多
关键词 superchirality circular dichroism Fabry-Pérot cavity chiral metasurface
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Optical System Design of Inter-Spacecraft Laser Interferometry Telescope 认领 引用 被引量：2
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作者 Shengnan Chen Huilin Jiang +1 位作者 Chunyan Wang Zhe Chen 《Optics and Photonics Journal》 2019年第8期26-37,共12页
The fundamental measurement of space gravitational wave detection is to monitor the relative motion between pairs of freely falling test masses using heterodyne laser interferometry to a precision of 10 pm. The masses... The fundamental measurement of space gravitational wave detection is to monitor the relative motion between pairs of freely falling test masses using heterodyne laser interferometry to a precision of 10 pm. The masses under test are millions of kilometers apart. The inter-spacecraft laser interferometry telescope deliver laser efficiently from one spacecraft to another. It is an important component of the gravitational wave detection observatory. It needs to meet the requirements of large compression ratio, high image quality and extraordinary stray light suppression ability. Based on the primary aberration theory, the method of the large compression ratio off-axis four-mirror optical system design is explored. After optimization, the system has an entrance pupil of 200 mm, compression ratio of 40 times, scientific field of view (FOV) of ±8 μrad. To facilitate suppressing the stray light and delivering the laser beam to the back-end scientific interferometers, the intermediate images and the real exit pupils are spatially available. Over the full FOV, the maximum root mean square (RMS) wavefront error is less than 0.007λ, PV value is less than 0.03λ (λ = 1064 nm). The image quality is approached to the diffraction-limit. The TTL noise caused by the wavefront error of the telescope is analyzed. The TTL noise in the image space of 300 μrad range is less than 1 × 10-10 m whose slope is lower than 0.6 μmad, which is under the noise budget of the laser interferometer space antenna (LISA), satisfying the requirements of space gravitational wave detection. 展开更多
关键词 Laser Interferometry Telescope Optical Design Gravitational Waves
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Deep-learning-based cryptanalysis of two types of nonlinear optical cryptosystems 认领 引用
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作者 Xiao-Gang Wang Hao-Yu Wei 《Chinese Physics B》 SCIE EI CAS CSCD 2022年第9期293-300,共8页
The two types of nonlinear optical cryptosystems(NOCs)that are respectively based on amplitude-phase retrieval algorithm(APRA)and phase retrieval algorithm(PRA)have attracted a lot of attention due to their unique mec... The two types of nonlinear optical cryptosystems(NOCs)that are respectively based on amplitude-phase retrieval algorithm(APRA)and phase retrieval algorithm(PRA)have attracted a lot of attention due to their unique mechanism of encryption process and remarkable ability to resist common attacks.In this paper,the securities of the two types of NOCs are evaluated by using a deep-learning(DL)method,where an end-to-end densely connected convolutional network(DenseNet)model for cryptanalysis is developed.The proposed DL-based method is able to retrieve unknown plaintexts from the given ciphertexts by using the trained DenseNet model without prior knowledge of any public or private key.The results of numerical experiments with the DenseNet model clearly demonstrate the validity and good performance of the proposed the DL-based attack on NOCs. 展开更多
关键词 optical encryption nonlinear optical cryptosystem deep learning phase retrieval algorithm
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Design of distributed feedback grating for QCL based on time-domain finite-difference method 认领 引用
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作者 CUI Jintao CHEN Guang +3 位作者 ZHANG Dongliang ZHANG Shiya LU Lidan ZHU Lianqing 《Optoelectronics Letters》 EI 2025年第9期520-527,共8页
Quantum cascade lasers(QCLs) have broad application potentials in infrared countermeasure system,free-space optical communication and trace gas detection.Compared with traditional Fabry-Pérot(FP) cavity and exter... Quantum cascade lasers(QCLs) have broad application potentials in infrared countermeasure system,free-space optical communication and trace gas detection.Compared with traditional Fabry-Pérot(FP) cavity and external cavity,distributed feedback quantum cascade lasers(DFB-QCLs) can obtain narrower laser linewidth and higher integration.In this paper,the structure design,numerical simulation and optimization of the Bragg grating of DFB-QCLs are carried out to obtain the transmission spectrum with central wavelength at 4.6 μm.We analyze the relationship among the structure parameters,the central wavelength shift and transmission efficiency using coupled-wave theory and finite-difference time-domain(FDTD) method.It is shown that the increase in the number of grating periods enhances the capabilities of mode selectivity,while the grating length of a single period adjustment directly determines the Bragg wavelength.Additionally,variations in etching depth and duty cycle lead to blue and red shifts in the central wavelength,respectively.Based on the numerical simulation results,the optimized design parameters for the upper buffer layer and the upper cladding grating are proposed,which gives an optional scheme for component fabrication and performance improvement in the future. 展开更多
关键词 trace gas detectioncompared transmission spectrum central wavelen structure designnumerical simulation narrower laser linewidth quantum cascade lasers qcls quantum cascade lasers infrared countermeasure systemfree space feedback quantum cascade lasers dfb qcls
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High signal-to-noise ratio microwave signal generation based on SBS assisted optical heterodyne technology 认领 引用
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作者 LUO Qiaoxia ZHAO Zhongbin +3 位作者 HU Tianhao ZHOU Yong ZHENG Ziqi GAO Weiqing 《量子电子学报》 CAS CSCD 北大核心 2025年第5期677-685,共9页
In this work,the generation of high signal-to-noise ratio(SNR)single-frequency microwave signal without noise sidebands is demonstrated based on the interaction of integrated all-fiber lasers.The microwave signals are... In this work,the generation of high signal-to-noise ratio(SNR)single-frequency microwave signal without noise sidebands is demonstrated based on the interaction of integrated all-fiber lasers.The microwave signals are generated by the interference between a narrow linewidth Brillouin pump light from a single-frequency laser and the Stokes light generated by it.Firstly,the linewidths of the Stokes lights are compressed to~43 Hz based on the stimulated Brillouin scattering(SBS)effect,which ensures that the frequency noise is as low as possible.And then,the relative intensity noise(RIN)of the first order Stokes light is reduced by 21 dB/Hz based on the noise dynamics principle in cascaded SBS effect.By simultaneously reducing the frequency noise and the intensity noise of the coherent signals,the noise sidebands of microwave signals are completely suppressed.As result,the SNR of the microwave signal is improved from 48 dB to 84 dB at the first-order Brillouin frequency shift of 9.415 GHz.Meanwhile,a microwave signal with a SNR of 70 dB is generated at the second-order Brillouin frequency shift of 18.827 GHz.This kind of microwave signals with narrow linewidth and high SNR can provide higher detection resolution and higher transmission efficiency for applications on radar,satellite communication and so on. 展开更多
关键词 laser techniques fiber lasers microwave photonics optical heterodyne technology noise suppression
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An innovative multi-energy field-assisted ultra-precision machining technology:in-situ laser-magnetic dual-field assisted diamond cutting 认领 引用 被引量：1
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作者 Yintian Xing Yue Liu +8 位作者 Changlin Liu Yuhan Li Tengfei Yin Sen Yin Zhanwen Sun Zhiwei Zhu Changxi Xue Wai Sze Yip Suet To 《International Journal of Extreme Manufacturing》 SCIE EI CAS CSCD 2026年第2期710-741,共32页
Field-assisted diamond cutting technology is a significant machining method that utilizes external energy fields to enhance the manufacturing performance.However,aimed the emergence of advanced high-performance materi... Field-assisted diamond cutting technology is a significant machining method that utilizes external energy fields to enhance the manufacturing performance.However,aimed the emergence of advanced high-performance materials,traditional single-field-assisted machining struggles to meet stringent precision requirements.Therefore,this study introduces an innovative and unique multi-energy field-assisted ultra-precision machining technology,in-situ laser-magnetic dual-field assisted diamond cutting(LMDFDC),to transcend the limitations of conventional single-field-assisted cutting methods and advance the machinability of challenging materials,notably the multi-principal-element high-entropy alloy(HEA).To elucidate the fundamental science questions of“what occurs,what changes,and what improves”in this work,the phenomenological behaviors of the dual-field coupling interaction are systematically investigated through advanced characterization techniques,spanning macroscopic surface integrity to microscopic atomic arrangement.This comprehensive study encompasses integrated analyses of four machining techniques for HEA workpiece,namely dual-energy field,two single-energy fields,and no-energy field.The research results indicate that the dual-field coupling effect demonstrates a leap in manufacturing performance through thermo-magneto-mechanical multi-physical synergistic interactions,primarily manifested in improved surface quality,reduced subsurface damage,suppressed diamond tool wear,and enhanced material removal stability.The significance of in-situ LMDFDC technology resides in propelling frontier academic developments in multi-physics coupled manufacturing theories while uncovering innovative machining approaches for next-generation high-performance materials. 展开更多
关键词 multi-energy field-assisted machining technology ultraprecision diamond cutting technology laser field magnetic field high-entropy alloy
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Effect of Satellite Vibration on Performance of Free-space Optical Communication 认领 引用
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作者 YIN Ke-xin JIANG Hui-lin YANG Hua-min WU Qiong QI Yu-lan 《通讯和计算机（中英文版）》 2007年第1期41-45,共5页
Free-space optical communication offers an attractive alternative for transferring high-bandwidth data over RF （Radio Frequency） signals. However, satellite vibration is the major pointing error. Without compensatin... Free-space optical communication offers an attractive alternative for transferring high-bandwidth data over RF （Radio Frequency） signals. However, satellite vibration is the major pointing error. Without compensating for it, the optical communication terminal cannot achieve accurate and stable links. The effect of this phenomena leads to the misalignment between the transmitter and the receiver, decrease in the received signal and increase in BER （Bit Error Rate）. With this in mind, this paper examines the effect of satellite vibration on optical link and develops a BER model that takes the satellite vibration into account. Then, a feed-forward vibration compensation model under fine tracking mode is designed to decrease this residual jitter influences. The results show that the proposed method is simple and effective, and the vibration amplitude can be decreased greatly. 展开更多
关键词 光通信 人造卫星 指示误差 空间通信
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Capability of Raman lidar for monitoring the variation of atmospheric CO_2 profile 认领 引用 被引量：12
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作者 赵培涛 张寅超 +5 位作者 王莲 胡顺星 苏嘉 曹开法 赵曰峰 胡欢陵 《Chinese Physics B》 SCIE EI CAS 2008年第1期335-342,共8页
Lidar （Light detection and ranging） has special capabilities for remote sensing of many different behaviours of the atmosphere. One of the techniques which show a great deal of promise for several applications is Ra... Lidar （Light detection and ranging） has special capabilities for remote sensing of many different behaviours of the atmosphere. One of the techniques which show a great deal of promise for several applications is Raman scattering. The detecting capability, including maximum operation range and minimum detectable gas concentration is one of the most significant parameters for lidar remote sensing of pollutants. In this paper, based on the new method for evaluating the capabilities of a Raman lidar system, we present an evaluation of detecting capability of Raman lidar for monitoring atmospheric CO2 in Hefei. Numerical simulations about the influence of atmospheric conditions on lidar detecting capability were carried out, and a conclusion can be drawn that the maximum difference of the operation ranges caused by the weather conditions alone can reach about 0.4 to 0.5km with a measuring precision within 30ppmv. The range of minimum detectable concentration caused by the weather conditions alone can reach about 20 to 35 ppmv in vertical direction for 20000 shots at a distance of 1 km on the assumption that other parameters are kept constant. The other corresponding parameters under different conditions are also given. The capability of Raman lidar operated in vertical direction was found to be superior to that operated in horizontal direction. During practical measurement with the Raman lidar whose hardware components were fixed, aerosol scattering extinction effect would be a significant factor that influenced the capability of Raman lidar. This work may be a valuable reference for lidar system designing, measurement accuracy improving and data processing. 展开更多
关键词 Raman lidar atmospheric CO2 minimum detectable concentration
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