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Quantum multiparameter estimation with multimode photon catalysis entangled squeezed state

Frontiers of physics 2023年第4期18卷 265-276页

作者： Huan Zhang Wei Ye Shoukang Chang Ying Xia Liyun Hu Zeyang Liao School of Physics Sun Yat-sen UniversityGuangzhou 510275China School of Information Engineering Nanchang Hangkong UniversityNanchang 330063China MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter Shaanxi Province Key Laboratory of Quantum Information and Quantum Optoelectronic DevicesSchool of PhysicsXi’an Jiaotong UniversityXi’an 710049China Center for Quantum Science and Technology Jiangxi Normal UniversityNanchang 330022China

We propose a method to generate the multi-mode entangled catalysis squeezed vacuum states(MECSVS)by embedding the cross-Kerr nonlinear medium into the Mach–Zehnder *** method realizes the exchange of quantum states between different modes based on Fredkin *** addition,we study the MECSVS as the probe state of multi-arm optical interferometer to realize multi-phase simultaneous *** results show that the quantum Cramer–Rao bound(QCRB)of phase estimation can be improved by increasing the number of catalytic photons or decreasing the transmissivity of the optical beam splitter using for photon *** addition,we also show that even if there is photon loss,the QCRB of our photon catalysis scheme is lower than that of the ideal entangled squeezed vacuum states(ESVS),which shows that by performing the photon catalytic operation is more robust against photon loss than that without the catalytic *** results here can find applications in quantum metrology for multiparatmeter estimation.

关键词： quantum metrology squeezing vacuum quantum catalysis multi-parameter estimation

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Catalyst-free physical vapor deposition of crystalline PbSe nanosheets for fabrication of high-performance photodetector

Catalyst-free physical vapor deposition of crystalline PbSe ...

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2023 Applied Optics and Photonics China: Optical Sensing, Imaging, and Display technology and Applications;and Biomedical Optics, AOPC 2023

作者： Peng, Silu Zhang, Chaoyi Han, Jiayue Li, Chunyu Zhou, Hongxi Wang, Jun School of Optoelectronic Science and Engineering University of Electronic Science and Technology of China Chengdu610054 China State Key Laboratory of Electronic Thin Films and Integrated Devices University of Electronic Science and Technology of China Chengdu610054 China

ISBN: (纸本)9781510672321

Influenced by the prominent progress of two-dimensional (2D) layered crystals, the fabrication of 2D nanostructures from non-layered materials has attracted more and more attention. Lead selenide (PbSe) is one of the superior candidate materials for photodetector with suitable bandgap and outstanding photoelectric properties. The growth and device preparation of PbSe supply great interest for the development of high-performance infrared photodetectors. Although a lot of efforts have been paid on preparing PbSe nanostructures for miniaturized detectors, it is challenging to synthesize excellent crystallinity and thin 2D PbSe nanosheets because of its inherent rock salt nonlayered structure. In this work, we employ a catalyst-free facile physical vapor deposition (PVD) method for controllable synthesis of PbSe nanosheets by van der Waals epitaxy technology. By optimizing the growth temperature, PbSe nanosheetsfrom triangular pyramid island to square 2D plane can be obtained. In addition, the 2D PbSe nanosheets detector has a responsivity of 3.03 A/W at the wavelength of 520 nm with the power density of 5.05 mW/cm2. This work provides a facile strategy to synthesize high-quality 2D PbSe nanosheets which have enormous potentials to fabricate high-performance miniaturized photodetector. © 2023 SPIE. All rights reserved.

关键词： Nanosheets

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Correlating Defect Structures and Optical Performance in Bridgman-Grown Cs3Cu2I5 Crystals: A Defect Engineering Approach for Enhanced Blue Emission

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Inorganic Chemistry 2025年第22期64卷 11184-11191页

作者： Li, Sijia Zhang, Liang Nan, Weina Zhou, Boru Yin, Ziang Wang, Tao Yu, Hongwei Hu, Zhanggui Ye, Ning State Key Laboratory of Crystal Materials Tianjin Key Laboratory of Functional Crystal Materials Institute of Functional Crystals Tianjin University of Technology Tianjin300384 China State Key Laboratory of Solidification Processing Key Laboratory of Radiation Detection Materials and Devices Ministry of Industry and Information Technology Northwestern Polytechnical University Xi’an710072 China

Cs3Cu2I5, a nontoxic broad emitter with exceptional blue-emissive properties, holds great promise for optoelectronic applications. However, achieving large-size, high-quality single crystals with minimal defects remains a critical challenge. We report a defect engineering strategy to optimize the growth of high-quality Cs3Cu2I5 single crystals by systematically controlling the growth parameters and characterizing defects. Using the Bridgman method with precisely controlled molar ratios (CuI/CsI = 39%:61%) and thermal conditions (G = 16 K/cm, v = 0.45 mm/h), we demonstrate that constitutional supercooling-induced eutectic decomposition (L → Cs3Cu2I5 + CsCu2I3) leads to the formation of interlaced inclusions exhibiting a globule-to-lamellar transition morphology. Advanced microstructural and optical characterization revealed that these defect structures induced lattice expansion and competitive photon absorption, reducing the photoluminescence quantum yield by approximately 40% and lowering optical transmittance from 89 to 84%. Our defect-controlled growth approach achieves a 30% higher PLQY compared with conventional methods, establishing critical correlations between growth conditions, defect evolution, and optoelectronic performance in this promising lead-free blue-emitting perovskite system. These findings provide fundamental insights and practical guidelines for developing high-performance perovskite single crystals for advanced optoelectronic applications. © 2025 American Chemical Society.

关键词： Crystal growth from melt

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Physics-driven generative adversarial networks empower single-pixel infrared hyperspectral imaging

arXiv

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arXiv 2023年

作者： Wang, Dong-Yin Bie, Shu-Hang Chen, Xi-Hao Yu, Wen-Kai Key Laboratory of Optoelectronic Devices and Detection Technology School of Physics Liaoning University Shenyang110036 China Center for Quantum Technology Research Key Laboratory of Advanced Optoelectronic Quantum Architecture and Measurement of Ministry of Education School of Physics Beijing Institute of Technology Beijing100081 China

A physics-driven generative adversarial network (GAN) was established here for single-pixel hyperspectral imaging (HSI) in the infrared spectrum, to eliminate the extensive data training work required by traditional data-driven model. Within the GAN framework, the physical process of single-pixel imaging (SPI) was integrated into the generator, and the actual and estimated one-dimensional (1D) bucket signals were employed as constraints in the objective function to update the network’s parameters and optimize the generator with the assistance of the discriminator. In comparison to single-pixel infrared HSI methods based on compressed sensing and physics-driven convolution neural networks, our physics-driven GAN-based single-pixel infrared HSI can achieve higher imaging performance but with fewer measurements. We believe that this physics-driven GAN will promote practical applications of computational imaging, especially various SPI-based techniques. Copyright © 2023, The Authors. All rights reserved.

关键词： Hyperspectral imaging

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Rotation-induced plasmonic chiral quasi-bound states in the continuum

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Photonics Research 2025年第1期13卷 69-79页

作者： CHUNHUA QIN YADONG DENG TIANSHUO LYU CHAO MENG SÖREN IM SANDE SERGEY I.BOZHEVOLNYI JINHUI SHI FEI DING Key Laboratory of In-Fiber Integrated Optics of Ministry of Education and Key Laboratory of Photonic Materials and Devices Physics for Oceanic Applications of Ministry of Industry and Information Technology College of Physics and Optoelectronic EngineeringHarbin Engineering UniversityHarbin 150001China Centre for Nano Optics University of Southern DenmarkDK-5230 OdenseDenmark

Nanoscale light manipulation using plasmonic metasurfaces has emerged as a frontier in photonic research,offering strongly enhanced light-matter interactions with potential applications in sensing,communications,and quantum ***,we unveil the realization and control of chiral quasi-bound states in the continuum(quasi-BICs)by judiciously rotating one of the paired plasmonic bricks and thereby influencing structural *** precisely controlling the rotation angle,we enable continuous modulation of the radiation loss in quasi-BICs and transition from a perfect half-wave plate to a good absorber for the left-handed circularly polarized *** transformation leverages the intrinsic chirality with moderately high circular dichroism of∼0.35 in both simulation and experimental observations,manifesting unprecedented control over the chiral light within subwavelength *** modeling and numerical simulations complement our experimental findings,offering deep insights into underlying mechanisms and the role of symmetry breaking in realizing chiral *** observed phenomena open new pathways for developing ultra-compact chiral photonic devices with tailored optical properties,including highly sensitive chiral biosensors,circular dichroism spectroscopy,and chiral flat optical components for information processing.

关键词： quasi chiral circular

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Microwave pulse signal generation based on an active mode-locking optoelectronic oscillator by employing an electric mixer

Microwave pulse signal generation based on an active mode-lo...

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2023 Applied Optics and Photonics China: AI in Optics and Photonics, AOPC 2023

作者： Zhang, Yulin Fu, Zhenwei Zeng, Zhen Zhang, Zhiyao Liu, Yong State Key Laboratory of Electronic Thin Films and Integrated Devices School of Optoelectronic Science and Engineering University of Electronic Science and Technology of China Chengdu610054 China Research Center for Microwave Photonics School of Optoelectronic Science and Engineering University of Electronic Science and Technology of China Chengdu610054 China

ISBN: (纸本)9781510672383

An active mode-locking optoelectronic oscillator (OEO) based on an electric mixer is proposed and experimentally demonstrated. In this scheme, the external drive signal is injected into the intermediate frequency (IF) port of the electric mixer to achieve the periodic loss modulation of the OEO cavity. Once the frequency of the drive signal is set to be equal to an integer multiple of the free spectral range (FSR) of the OEO, the phase between the longitudinal modes can be locked to generate the stable multi-Tone microwave combs in the OEO cavity, which are coherently superimposed in the time domain to form the short microwave pulse signal with a repetition frequency equal to the frequency of the drive signal. In the experiment, the fundamental mode-locking and 50th-order mode-locking are realized in the proposed active mode-locking OEO, where the microwave pulse signals with the carrier frequency of 10 GHz, repetition rates of 98 kHz and 4.9 MHz, are generated. The phase noise at a frequency offset of 100 Hz is measured to be-94 dBc/Hz and-103 dBc/Hz for those two cases. Compared to the free-running OEO, the phase noise at 100 Hz frequency offset is reduced by 11 dB and 20 dB, respectively. © COPYRIGHT SPIE. Downloading of the abstract is permitted for personal use only.

关键词： optoelectronic devices

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Colloidal semiconductor nanocrystals for light emission and photonic integration

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Chip 2024年第1期3卷 1-17页

作者： Huan Liu Dabin Lin Puning Wang Tingchao He Rui Chen Department of Electrical and Electronic Engineering Southern University of Science and TechnologyShenzhen 518055China Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province College of Physics and Optoelectronic EngineeringShenzhen UniversityShenzhen 518060China

Solution-processed colloidal semiconductor nanocrystals(NCs)have become attractive materials for the development of optoelectronic and photonic devices due to their inexpensive synthesis and excellent optical ***,CdSe NCs with different dimensions and structures have achieved significant progress in photonic integrated circuits(PICs),including light generation(laser),guiding(waveguide),modulation,and detection on a *** article summarizes the development of CdSe NCs–based lasers and discusses the challenges and opportunities for the application of CdSe NCs in ***,an overview of the optical properties of CdSe-based NCs with different dimensions is presented,with emphasis on the amplified stimulated emission and laser ***,the nanophotonic devices and PICs based on CdSe NCs are introduced and ***,the prospects for PICs are addressed.

关键词： CdSe nanocrystals Amplified spontaneous emission Waveguide Laser Photonic integrated circuits

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通过侧链工程提高A-D-A'-D-A型非稠环电子受体的光伏性能

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Science China Materials 2024年第5期67卷 1594-1601页

作者：周霞魏文魁庞淑婷袁熙越李俊宇黄飞曹镛段春晖 School of New Energy Ningbo University of TechnologyNingbo315336China Molecular Materials and Nanosystems&Institute for Complex Molecular Systems Eindhoven University of Technology5600 MBEindhovenNetherlands Institute of Polymer Optoelectronic Materials and Devices State Key Laboratory of Luminescent Materials and DevicesSouth China University of TechnologyGuangzhou510640China

非稠环电子受体(NFREA)具有合成简单和结构修饰灵活的特点,是制备高性能低成本有机太阳电池(OSCs)的理想材料.本工作以不同侧链修饰的二氟苯并三氮唑(ffBTz)作为弱缺电子核(A’),分别设计合成了三种A-D-A’-D-A型NFREA,即ffBTz-BO、ffBT... 详细信息

非稠环电子受体(NFREA)具有合成简单和结构修饰灵活的特点,是制备高性能低成本有机太阳电池(OSCs)的理想材料.本工作以不同侧链修饰的二氟苯并三氮唑(ffBTz)作为弱缺电子核(A’),分别设计合成了三种A-D-A’-D-A型NFREA,即ffBTz-BO、ffBTz-EH和ffBTz-C4.其中,ffBTz-EH,由于其合适的侧链长度,在分子结晶度和分子堆积优势取向之间取得了平衡,从而获得了更高的电荷迁移率.并且得益于高效的电荷传输和最合适的相分离形貌,基于ffBTz-EH的OSC获得12.96%的最高能量转换效率,这也是A-D-A’-D-A型NFREA获得的最高效率之一.本研究表明,A’核心上的烷基侧链在调节分子结晶度、活性层形貌和进一步调控器件性能方面起着至关重要的作用,这为未来设计高效低成本的A-D-A’-D-A型非稠环电子受体提供了思路.

关键词： organic solar cells non-fused ring electron acceptors side chain engineering molecular orientation power conversion efficiency

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High coupling efficiency wedge-shaped cylindrical lensed fiber for the 2 µm band

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Applied Optics 2025年第15期64卷 4265-4270页

作者： Wang, Zhiyuan Yang, Chengao Chen, Yihang Yu, Hongguang Shi, Jianmei Cao, Juntian Wang, Tianfang Geng, Zhengqi Wen, Haoran Zhang, Enquan Tan, Hao Wu, Donghai Xu, Yingqiang Ni, Haiqiao Qu, Yi Niu, Zhichuan Key Laboratory of Laser Technology and Optoelectronic Functional Materials of Hainan Province Academician Team Innovation Center of Hainan Province Hainan International Joint Research Center for Semiconductor Lasers College of Physics and Electronic Engineering Hainan Normal University Haikou571158 China Key Laboratory of Optoelectronic Materials and Devices Chinese Academy of Sciences Institute of Semiconductors Chinese Academy of Sciences Beijing100083 China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of Sciences Beijing100049 China International Quantum Academy Shenzhen518048 China Hefei National Laboratory Hefei230088 China

It has always been difficult to achieve high-efficiency optical coupling from edge-emitting semiconductor laser diodes (LDs) to fibers, especially for the mid-infrared wavelength range due to the larger divergence angle. To improve the coupling efficiency, we systematically put up a theoretical model based on the hyperbolic-shaped fiber and used a genetic algorithm to optimize the wedge angle and tip radius of the wedge-shaped cylindrical lensed fiber, calculating the maximal coupling efficiency. The effect of working distance between the LD and fiber on coupling efficiency is also studied. The coupling efficiency can reach over 97% when the mode-field radius of the fiber equals the initial spot size of the laser in the slow-axis direction, providing a solution for efficient mid-infrared fiber coupling. © 2025 Optica Publishing Group. All rights, including for text and data mining (TDM), Artificial Intelligence (AI) training, and similar technologies, are reserved.

关键词： Optical fiber coupling

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Dynamic range enhancement of photonic sampling based on chirp management in cavity-less optical pulse source

Dynamic range enhancement of photonic sampling based on chir...

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2023 Applied Optics and Photonics China: AI in Optics and Photonics, AOPC 2023

作者： Gao, Fu Li, Zhengkai Zhang, Zhiyao Li, Heping Liu, Yong State Key Laboratory of Electronic Thin Films and Integrated Devices University of Electronic Science and Technology of China Chengdu610054 China School of Optoelectronic Science and Engineering University of Electronic Science and Technology of China Chengdu610054 China

ISBN: (纸本)9781510672383

An optimization method to improve the spurious free dynamic range (SFDR) of photonic sampling without sacrificing the signal-To-noise and distortion ratio (SINAD) is proposed and experimentally demonstrated. It is realized by managing the chirp in the generated ultrashort optical pulse train by simply changing the group velocity dispersion (GVD) of the dispersion compensation module (DCM) in the cavity-less ultra-short optical pulse source. In the simulation, the SFDRs of the photonic sampling for the input signals in the frequency range of 0.1 GHz to 40.1 GHz are significantly improved with residual linear chirp in the optical pulse train compared with the situation that the chirp is completely compensated. In the experiment, a 10.1 GHz single-Tone microwave signal is sampled and the SFDR is improved by 10.95 dB owing to the residual chirp in the optical pulse train. In addition, the SINAD is improved by 2.76 dB even though the power of the fundamental frequency signal is slightly reduced. The proposed scheme can also be applied to photonic sampling ADCs based on other optical pulse sources, which is favorable for alleviating the limitation from the nonlinearity of the electro-optic amplitude modulator. © COPYRIGHT SPIE. Downloading of the abstract is permitted for personal use only.

关键词： Analog to digital conversion

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