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Coexistence of multiuser entanglement distribution and classical light in optical fiber network with a semiconductor chip

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Chip 2024年第2期3卷 1-10页

作者： Xu Jing Cheng Qian Xiaodong Zheng Hu Nian Chenquan Wang Jie Tang Xiaowen Gu Yuechan Kong Tangsheng Chen Yichen Liu Chong Sheng Dong Jiang Bin Niu Liangliang Lu national Key laboratory of solid-{3. Microwave Devices and Circuits Nanjing Electronic Devices InstituteNanjing 210016China Key laboratory of Optoelectronic Technology of Jiangsu Province School of Physical Science and TechnologyNanjing Normal UniversityNanjing 210023China national laboratory of solid-{3. microstructures Nanjing UniversityNanjing 210093China Research Center for Quantum Optics and Quantum Communication School of ScienceQingdao University of TechnologyQingdao 266520China School of Internet Anhui UniversityHefei 230039China Hefei national laboratory Hefei 230088China

Building communication links among multiple users in a scalable and robust way is a key objective in achieving large-scale quantum *** a realistic scenario,noise from the coexisting classical light is inevitable and can ultimately disrupt the *** previous significant fully connected multiuser entanglement distribution experiments are conducted using dark fiber links,and there is no explicit relation between the entanglement degradations induced by classical noise and its error ***,a semiconductor chip with a high figure-of-merit modal overlap is fabricated to directly generate broadband polarization *** monolithic source maintains the polarization entanglement fidelity of above 96%for 42 nm bandwidth,with a brightness of 1.2×10^(7)Hz mW^(−1).A continuously working quantum entanglement distribution are performed among three users coexisting with classical *** finite-key analysis,secure keys are established and images encryption are enabled as well as quantum secret sharing between *** work paves the way for practical multiparty quantum communication with integrated photonic architecture compatible with real-world fiber optical communication network.

关键词： Quantum key distribution Semiconductor chip Raman noise Image encryption

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Independent dual beams generated by array element division in integrated optical phased arrays

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Chinese Optics Letters 2024年第7期22卷 35-41页

作者： Guihan Wu Yu Xin Lemeng Leng Xiang Ji Shichong Yang Kaifei Tang Quan Luo Hongsheng Luo Jinshan Su Wei Jiang College of Engineering and Applied Sciences Nanjing UniversityNanjing 210023China national laboratory of solid-{3. microstructures Nanjing 210093China Key laboratory of Intelligent Optical Sensing and Manipulation Ministry of EducationNanjing UniversityNanjing 210023China Jiangsu Key laboratory of Artificial Functional Materials Nanjing UniversityNanjing 210023China Key laboratory of Vibration Signal Capture and Intelligent Processing Yili Normal UniversityIli 835000China

Optical phased arrays(OPAs)have broad application prospects due to their advanced capability in beamforming and *** this work,we achieve independent dual beams in the far field by dividing the array elements of the OPA,with the maximum scanning range reaching 100°.Based on the working principle of OPAs,theoretical considerations of such multibeam generation are presented.A phase data allocation approach for OPAs in the presence of fabrication-induced random phase variation is *** of large ensembles of OPAs with various levels of random residual phase errors have been conducted to help analyze the *** approach can help OPAs realize multi-beams for light detection and ranging(LiDAR).

关键词： optical phased arrays beamforming phase error calibration array element division

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Silicon cross-coupled gated tunneling diodes

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Chip 2024年第2期3卷 79-87页

作者： Zhenyun Tang Zhe Wang Zhigang Song Wanhua Zheng laboratory of solid-state Optoelectronics Information Technology Institute of SemiconductorsChinese Academy of SciencesBeijing 100083China University of Chinese Academy of Sciences Beijing 100049China state Key laboratory of Superlattices and microstructures Institute of SemiconductorsChinese Academy of SciencesBeijing 100083China

Tunneling-based static random-access memory(SRAM)devices have been developed to fulfill the demands of high density and low power,and the performance of SRAMs has also been greatly ***,for a long time,there has not been a silicon based tunneling device with both high peak valley current ratio(PVCR)and practicality,which remains a gap to be *** on the existing work,the current manuscript proposed the concept of a new silicon-based tunneling device,i.e.,the silicon crosscoupled gated tunneling diode(Si XTD),which is quite simple in structure and almost completely compatible with mainstream *** technology computer aided design(TCAD)simulations,it has been validated that this type of device not only exhibits significant negative-differential-resistance(NDR)behavior with PVCRs up to 10^(6),but also possesses reasonable process ***,SPICE simulation showed the great potential of such devices to achieve ultralow-power tunneling-based SRAMs with standby power down to 10^(−12)W.

关键词： Low power Silicon-based tunneling device Negative differential resistance(NDR) Peak-to-valley current ratio(PVCR) TCAD simulation

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Complex-frequency waves:beat loss and win sensitivity

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Light(Science & Applications) 2024年第2期13卷 181-183页

作者： Qingqing Cheng Tao L School of Optical-Electrical and Computer Engineering University of Shanghai for Science and TechnologyShanghai200093China Department of Respiratory Diseases and Critical Medicine Quzhou Hospital Affiliated to Wenzhou Medical UniversityQuzhou324000China national laboratory of solid {3. microstructures College of Engineering and Applied SciencesNanjing UniversityNanjing210093China

Recent experiments have demonstrated that synthesized complex-frequency waves can impart a virtual gain to molecule sensing systems,which can effectively restore information lost due to intrinsic molecular *** enhancement notably amplifies the signal of trace molecular vibrational fingerprints,thereby substantially improving the upper limit of sensitivity.

关键词： thereby Complex limit

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Oscillation of Dzyaloshinskii–Moriya interaction driven by weak electric fields

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Chinese Physics B 2024年第2期33卷 487-491页

作者：陈润泽曹安妮王馨苒柳洋杨洪新赵巍胜 Fert Beijing Institute MIIT Key Laboratory of SpintronicsSchool of Integrated Circuit Science and EngineeringBeihang UniversityBeijing 100191China Hefei Innovation Research Institute Beihang UniversityHefei 230013China Beihang-Goertek Joint Microelectronics Institute Qingdao Research InstituteBeihang UniversityQingdao 266000China national laboratory of solid {3. microstructures School of PhysicsCollaborative Innovation Center of Advanced MicrostructuresNanjing UniversityNanjing 210093China Beijing Microelectronics Technology Institute Beijing 100076China

Dzyaloshinskii–Moriya interaction(DMI) is under extensive investigation considering its crucial status in chiral magnetic orders, such as Néel-type domain wall(DW) and skyrmions. It has been reported that the interfacial DMI originating from Rashba spin–orbit coupling(SOC) can be linearly tuned with strong external electric fields. In this work, we experimentally demonstrate that the strength of DMI exhibits rapid fluctuations, ranging from 10% to 3.% of its original value, as a function of applied electric fields in Pt/Co/MgO heterostructures within the small field regime(< 10-2V/nm). Brillouin light scattering(BLS) experiments have been performed to measure DMI, and first-principles calculations show agreement with this observation, which can be explained by the variation in orbital hybridization at the Co/MgO interface in response to the weak electric fields. Our results on voltage control of DMI(VCDMI) suggest that research related to the voltage control of magnetic anisotropy for spin–orbit torque or the motion control of skyrmions might also have to consider the role of the external electric field on DMI as small voltages are generally used for the magnetoresistance detection.

关键词： Dzyaloshinskii-Moriya interaction weak electric field control effect Rashba spin-orbit coupling interfacial orbital hybridization

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Embedded Majorana islands

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Science China(Physics,Mechanics & Astronomy) 2024年第9期67卷 154-164页

作者： Jin-Xing Hou Alex Weststrom Rui Wang Wen-Li Yang Jian Li Institute of Modern Physics Northwest UniversityXi’an 710127China Department of Physics School of ScienceWestlake UniversityHangzhou 310030China Shaanxi Key laboratory for Theoretical Physics Frontiers Xi’an 710127China Institute of Natural Sciences Westlake Institute for Advanced StudyHangzhou 310024China national laboratory of solid {3. microstructures and Department of Physics Nanjing UniversityNanjing 210093China Collaborative Innovation Center for Advanced microstructures Nanjing 210093China Peng Huanwu Center for Fundamental Theory Xi’an 710127China

Mesoscopic superconducting islands hosting Majorana zero modes(MZMs),or Majorana islands in short,offer a prototype of topological *** this work we investigate theoretically the model of a generic Majorana island tunneling-coupled to a singlepiece metallic substrate,hence an embedded Majorana *** show the crucial consequences of an interplay between the topological ground states nonlocally addressed by the MZMs and the metallic bath with coherent electron propagation:on the one hand,the topological degeneracy on the Majorana island can be preserved,by virtue of the particle-hole symmetry,despite the apparent bath-induced coupling between MZMs;on the other hand,the electronic interference in the metallic bath may lead to profound alterations to the renormalization group behavior of the hybrid system towards low energy/temperature compared with conventional Kondo *** work serves to establish the model of embedded Majorana islands as an experimentally relevant and theoretically intriguing problem particularly in the direction of topological quantum computation.

关键词： topological quantum computation Majorana zero modes topological qubit mesoscopic superconductor topological Kondo effect

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转角相位匹配实现亚相干长度非线性光学调控

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Science Bulletin 2024年第9期69卷 1170-1172页

作者：谢臻达吕新杰祝世宁 national laboratory of solid {3. microstructures School of Electronic Science and EngineeringCollege of Engineering and Applied SciencesSchool of Physicsand Collaborative Innovation Center of Advanced MicrostructuresNanjing UniversityNanjing 210093China

As recognized since the very early age in the 1960s [1], phase matching is always the crucial problem throughout the development of the nonlinear optics up to date. This problem of the phase mismatch is raised as result of material dispersion inside a nonlinear crystal, from the momentum conservation in the optical nonlinear interaction process. In the case of the second harmonic(SH) generation, for example, the momentum of an SH photon is normally not matched to the sum of the momenta of the two fundamental beam photons, due to their different refractive indexes.

关键词：非线性光学相干长度相位匹配

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Low-energy spin dynamics in a Kitaev material Na_(3.Ni_(2)BiO_(6) investigated by nuclear magnetic resonance

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Chinese Physics B 2024年第6期33卷 518-524页

作者：史昕雨崔祎上官艳艳徐霄宇吴占龙胡泽李硕杜柯帆陈颖马龙刘正鑫温锦生张金珊于伟强 Mathematics and Physics Department North China Electric Power UniversityBeijing 102206China Department of Physics and Beijing Key laboratory of Opto-electronic Functional Materials&Micro-nano Devices Renmin University of ChinaBeijing 100872China Key laboratory of Quantum state Construction and Manipulation(Ministry of Education) Renmin University of ChinaBeijing 100872China national laboratory of solid {3. microstructures and Department of Physics Nanjing UniversityNanjing 210093China Anhui Province Key laboratory of Condensed Matter Physics at Extreme Conditions High Magnetic Field LaboratoryChinese Academy of SciencesHefei 230031China Innovative Center for Advanced microstructures Nanjing UniversityNanjing 210093China

We perform ^(23.Na nuclear magnetic resonance(NMR) and magnetization measurements on an S=1,quasi-2D honeycomb lattice antiferromagnet Na_(3.Ni_(2)BiO_(6).A large positive Curie-Weiss constant of 22.9 K is *** NMR spectra at low fields are consistent with a zigzag magnetic order,indicating a large easy-axis *** the field applied along the c*axis,the NMR spectra confirm the existence of a 1/3.magnetization plateau phase between 5.1 T and 7.1 *** transition from the zigzag order to the 1/3.magnetization plateau phase is also found to be a first-order type.A monotonic decrease of the spin gap is revealed in the 1/3.magnetization plateau phase,which reaches zero at a quantum critical field H_(C)≈8.3. T before entering the fully polarized *** data suggest the existence of exchange frustration in the system along with strong ferromagnetic interactions,hosting the possibility for Kitaev ***,well below the ordered phase,the 1/T_(1) at high fields shows either a level off or an enhancement upon cooling below 3.K,which suggests the existence of low-energy fluctuations.

关键词： one–third magnetization plateau phase nuclear magnetic resonance honeycomb-lattice antiferromagnet Kitaev interaction

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Quantum squeezing induced nonreciprocal phonon laser

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Science China(Physics,Mechanics & Astronomy) 2024年第6期67卷 20-30页

作者： Tian-Xiang Lu Yan Wang Keyu Xia Xing Xiao Le-Man Kuang Hui Jing College of Physics and Electronic Information Gannan Normal UniversityGanzhou 341000China Key laboratory of Low-Dimensional Quantum Structures and Quantum Control of Ministry of Education Department of Physics and Synergetic Innovation Center for Quantum Effects and ApplicationsHunan Normal UniversityChangsha 410081China Academy for Quantum Science and Technology Zhengzhou University of Light IndustryZhengzhou 450002China College of Engineering and Applied Sciences National Laboratory of Solid State Microstructuresand Collaborative Innovation Center of Advanced MicrostructuresNanjing UniversityNanjing 210023China

Phonon lasers or coherent amplifications of mechanical oscillations are powerful tools for fundamental studies on coherent acoustics and hold potential for diverse applications,ranging from ultrasensitive force sensing to phononic information ***,we propose the use of an optomechanical resonator coupled to a nonlinear optical resonator for directional phonon *** find that by pumping the nonlinear optical resonator,directional optical squeezing can occur along the pump *** a result,we can achieve the directional mechanical gain using directional optical squeezing,thereby leading to nonreciprocal phonon lasing with a well-tunable directional power *** work proposes a feasible way to build nonreciprocal phonon lasers with various nonlinear optical media,which are important for a wide range of applications,such as directional acoustic amplifiers,invisible sound sensing or imaging,and one-way phononic networks.

关键词： nonreciprocal phonon laser directional quantum squeezing optomechanics

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Plasmon-enhanced self-powered GaN/ZnTe core/shell nanopillar array photodetector

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Nano Research 2024年第6期17卷 5569-5577页

作者： Jianqi Dong Dongqi Zhang Yi Ma Daotong You Jinping Chen Bin Liu Xingfu Wang Zengliang Shi Chunxiang Xu state Key laboratory of Digital Medical Engineering School of Biological Science and Medical EngineeringSoutheast UniversityNanjing 210096China Jiangsu Provincial Key laboratory of Advanced Photonic and Electronic Materials National Laboratory of Solid State MicrostructuresSchool of Electronic Science and EngineeringNanjing UniversityNanjing 210093China Institute of Photonics Technology Jinan UniversityGuangzhou 510632China Guangdong Engineering Research Center of Optoelectronic Functional Materials and Devices Institute of SemiconductorsSouth China Normal UniversityGuangzhou 510631China

Nanostructure photodetectors,as the core component of optoelectronic devices,are mainly focused on the precise preparation of mixed-component nano-heterostructures and the realization of zero power consumption ***,we successfully fabricated n-GaN/p-ZnTe core/shell nanopillar array and realized self-power ultraviolet/violet *** radial heterojunction nanodevice reveals high light-dark current ratio of 104 at 0 V bias,indicating effective carriers’*** more,by integrating plasmonic effect,the responsivity and detectivity of the Au nanoparticles decorated device are increased from 3.85 to 148.83.mA/W and 4.45×1011 to 2.3.×1012 Jones under 3.5 nm UV light *** the rise and the fall time are decreased 1.3.times and 6.8 times under 520 nm visible light irradiation at 0 V *** high photocurrent gain is derived from that the oscillating high-energy hot electrons in Au nanoparticles spontaneously inject into the ZnTe conduction band to involve the photodetection *** work presents an effective route to prepare high-performance self-power photodetector and provides a promising blueprint to realize different functional photoelectronic devices based on core/shell nanostructure.

关键词： GaN/ZnTe core/shell nanopillar array self-power ultraviolet/visible photodetector plasmonic effect

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