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界面光蒸汽转化研究进展

科学通报 2018年第14期63卷 1405-1416+1404页

作者：魏天骐李秀强李金磊周林祝世宁朱嘉南京大学现代工程与应用科学学院

光热转化作为一种太阳能利用方式,由于其相对高效、低成本的特点,一直以来被广泛关注与研究.近年来,界面光蒸汽转化作为一种新型光热转化机制,借助微纳结构材料设计及光学、热学有效调控,将太阳能充分吸收并将能量转化局域到气-液界面,... 详细信息

光热转化作为一种太阳能利用方式,由于其相对高效、低成本的特点,一直以来被广泛关注与研究.近年来,界面光蒸汽转化作为一种新型光热转化机制,借助微纳结构材料设计及光学、热学有效调控,将太阳能充分吸收并将能量转化局域到气-液界面,从而使得光-蒸汽能量转化效率有效提高,并因此被认为是一种极具前景的高效太阳能光热转化途径.本文介绍了界面光蒸汽转化的相关机制,包括光吸收、热管理和水输送,并展示了通过一系列微纳结构材料设计来提高其能量转化效率的最新研究进展;随后介绍了目前基于界面光蒸汽转化的一些主要应用;最后对界面光蒸汽转化的未来发展方向进行了展望.

关键词：界面光蒸汽转化微纳结构光吸收热管理水输送太阳能海水淡化

Chromatic dispersion manipulation based on metasurface devices in the mid-infrared region

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Chinese Optics Letters 2020年第8期18卷 65-71页

作者： Lin Li Quan Yuan Run Chen Xiujuan Zou Wenbo Zang Tianyue Li Gaige Zheng Shuming Wang Zhenlin Wang shining zhu National Laboratory of Solid State Microstructures School of PhysicsCollege of Engineering and Applied SciencesNanjing UniversityNanjing 210093China Key Laboratory of Intelligent Optical Sensing and Manipulation Ministry of EducationNanjing 210093China

The chromatic aberration of metasurfaces limits their application. How to cancel or utilize the large chromatic dispersion of metasurfaces becomes an important issue. Here, we design Si-based metasurfaces to realize flexible chromatic dispersion manipulation in mid-infrared region. We demonstrate the broadband achromatic metalens and achromatic gradient metasurface to cancel the chromatic aberration over a continuous bandwidth(8–12 μm). In contrast, the metalens and gradient metasurface with enhanced chromatic dispersion have also been realized, where the focal length and deflection angle with different wavelengths vary more significantly than the conventional devices designed with geometric phase. These demonstrations indicate promising potential applications.

关键词： metasurfaces chromatic dispersion manipulation achromatic metalenses super dispersion

High-quality quantum process tomography of time-bin qubit’s transmission over a metropolitan fiber network and its application

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Chinese Optics Letters 2020年第8期18卷 72-76页

作者： Peiyu Zhang Liangliang Lu Fangchao Qu Xinhe Jiang Xiaodong Zheng Yanqing Lu shining zhu Xiao-Song Ma National Laboratory of Solid-state Microstructures School of PhysicsCollege of Engineering and Applied SciencesCollaborative Innovation Center of Advanced MicrostructuresNanjing UniversityNanjing 210093China

We employ quantum state and process tomography with time-bin qubits to benchmark a city-wide metropolitan quantum communication *** this network,we implement real-time feedback control systems for stabilizing the phase of the time-bin qubits and obtain a 99.3%quantum process fidelity to the ideal channel,indicating the high quality of the whole quantum communication *** allows us to implement a field trial of high-performance quantum key distribution using coherent one way protocol with an average quantum bit error rate and visibility of 0.25%and 99.2%during 12 h over 61 *** results pave the way for the high-performance quantum network with metropolitan fibers.

关键词： quantum process tomography quantum networks quantum communication quantum key distribution

用电阻法研究超导体YBa_2Cu_3O_(7-x)的高温特性

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南京师大学报（自然科学版） 1989年第4期12卷 39-43页

作者：祝世宁淮阴师专

本文报道用测量电阻的方法,研究高温超导体YB_(a2)Cu_3 O_(7-x)的高温电阻率,正交一四方结构相变和氧在晶格内的扩散,并对实验结果进行了分析和讨论。

关键词：超导体 YBa2Cu3O7-x 高温特性

Generation and manipulation of tripartite frequency correlation in optical superlattice

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Generation and manipulation of tripartite frequency correlat...

Enhanced Raman Scattering by Quasi-phase-matched Processes in ax2 Photonic Crystal

第十八届全国量子光学学术会议

作者：张群永 Ping Xu Guang-Tai Xue Yan-Xiao Gong Zhenda Xie shining zhu 南京大学 National Laboratory of Solid State Microstructures and School of Physics Nanjing University Institute for Quantum Information and State Key Laboratory of High Performance Computing College of ComputingNational University of Defense Technology National Laboratory of Solid State Microstructures and School of Electronic Science and Engineering Nanjing University

A monolithic optical superlattice which contains two segments of periodically poled area is designed to generated triplets. We investigate how to manipulate the tripartite frequency correlation of triplets under extended phase-matching conditions. By choosing proper pump bandwidth and crystal length, the tripartite frequency will show a full correlation, partial correlation or no correlation, corresponding to one none-separable triplet, separable one photon and biphoton or three separable photons, respectively. We found that the spacetime wave packets of the triplets could show a variety of fine structures when the physical parameters were adjusted. This research plays an important role in understanding the basic properties of multi-body correlation and can also supply key elements for developing new quantum technologies.

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Enhanced Raman Scattering by Quasi-phase-matched Processes i...

Locally periodically poled LNOI ridge waveguide for second harmonic generation [Invited]

第十二届全国量子光学学术会议

作者： P. Xu, shining zhu (National Laboratory of Solid State Microstnictures, Nanjing University, Nanjing, 210093, China)

＜正＞An intense comb-shaped Raman spectra were obtained from a two-dimensional nonlinearx photonic crystal -a hexagonally poled LiTaO3 crystal with lattice parameter 9 micros. The lowest Raman shift was down to 2 cm’ and the order of anti-stokes and stokes signals both achieved 11. The novel Raman spectra were mediated first by intense phonon-polariton fields, which were driven through the quasi-phase-matched coupling between the incident

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Chinese Optics Letters 2021年第6期19卷 28-32页

作者： Biao Mu Xianfang Wu Yunfei Niu Yan Chen Xinlun Cai Yanxiao Gong Zhenda Xie Xiaopeng Hu shining zhu National Laboratory of Solid State Microstructures College of Engineering and Applied SciencesCollege of Electronic Science and Engineeringand School of PhysicsNanjing UniversityNanjing 210093China State Key Laboratory of Optoelectronic Materials and Technologies and School of Electronics and Information Technology Sun Yat-sen UniversityGuangzhou 510275China

Periodically poled lithium niobate on insulator(LNOI) ridge waveguides are desirable for high-efficiency nonlinear frequency conversions, and the fabrication process of such waveguides is crucial for device performance. In this work, we report fabrication and characterization of locally periodically poled ridge waveguides. Ridge waveguides were fabricated by dry etching, and then the high-voltage pulses were applied to locally poled ridge waveguides. Second harmonic generation with normalized conversion efficiency of 435.5% W^(-1)·cm^(-2) was obtained in the periodically poled LNOI ridge waveguide,which was consistent with the triangular domain structure revealed by confocal microscopy.

关键词： lithium niobate on insulator ridge waveguide ferroelectric domain inversion second harmonic generation

Robust second-order correlation of twin parametric beams generated by amplified spontaneous parametric down-conversion

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Chinese Optics Letters 2020年第12期18卷 63-67页

作者： Kunpeng Jia Xiaohan Wang Xinjie LV Ping Xu Zhenlin Wang ZhiWei Wuang Gang Zhao Yan-Xiao Gong Zhenda Xie shining zhu National Laboratory of Solid State Microstructures School of PhysicsSchool of Electronic Science and EngineeringCollege of Engineering and Applied Sciencesand Collaborative Innovation Center of Advanced MicrostructuresNanjing UniversityNanjing 210093China Institute for Quantum Information and State Key Laboratory of High Performance Computing.College of Computing National University of Defense TechnologyChangsha 410073China Mesoscopic Optics and Quantum Electronics Laboratory University of California Los AngelesCciliforniaCA 90095USA

We report an observation of the second-order correlation between twin beams generated by amplified spontaneous parametric down-conversion operating above threshold with kilowatt-level peak power, from a periodically poled Li Ta O3 crystal via a single-pass scheme. Photocurrent correlation was measured because of the bright photon streams, with raw visibility of 37.9% or 97.3% after electronic filtering. As expected in our theory, this correlation is robust and insensitive to parametric gain and detection loss, enabling important applications in optical communications, precision measurement, and nonlocal imaging.

关键词： amplified spontaneous parametric down-con version robust second-order correlation high-gain twin beams

Heterogeneously integrated,superconducting silicon-photonic platform for measurementdevice-independent quantum key distribution

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Advanced Photonics 2021年第5期3卷 28-35页

作者： Xiaodong Zheng Peiyu Zhang Renyou Ge Liangliang Lu Guanglong He Qi Chen Fangchao Qu Labao Zhang Xinlun Cai Yanqing Lu shining zhu Peiheng Wu Xiao-Song Ma Nanjing University National Laboratory of Solid-state MicrostructuresSchool of PhysicsResearch Institute of Superconducting ElectronicsSchool of Electronic Science and EngineeringCollege of Engineering and Applied SciencesCollaborative Innovation Center of Advanced MicrostructuresNanjingChina Sun Yat-sen University State Key Laboratory of Optoelectronic Materials and TechnologiesSchool of Electronics and Information TechnologyGuangzhouChina

Integrated photonics provides a route to both miniaturization of quantum key distribution(QKD)devices and enhancing their performance.A key element for achieving discrete-variable QKD is a singlephoton *** is highly desirable to integrate detectors onto a photonic chip to enable the realization of practical and scalable quantum *** realize a heterogeneously integrated,superconducting silicon-photonic *** the unique high-speed feature of our optical waveguide-integrated superconducting detector,we perform the first optimal Bell-state measurement(BSM)of time-bin encoded qubits generated from two independent *** optimal BSM enables an increased key rate of measurement-device-independent QKD(MDI-QKD),which is immune to all attacks against the detection system and hence provides the basis for a QKD network with untrusted *** with the timemultiplexed technique,we have enhanced the sifted key rate by almost one order of *** a 125-MHz clock rate,we obtain a secure key rate of 6.166 kbps over 24.0 dB loss,which is comparable to the state-of-the-art MDI-QKD experimental results with a GHz clock *** with integrated QKD transmitters,a scalable,chip-based,and cost-effective QKD network should become realizable in the near future.

关键词： quantum key distribution hybrid photonics single-photon detector Bell-state measurement time-multiplexing