检索结果-内蒙古大学图书馆

Direct extraction of topological Zak phase with the synthetic dimension

Light(Science & Applications) 2023年第4期12卷 671-679页

作者： Guangzhen Li Luojia Wang Rui Ye Yuanlin Zheng Da-Wei Wang Xiong-Jun Liu Avik Dutt Luqi Yuan Xianfeng Chen State Key Laboratory of Advanced Optical Communication Systems and Networks School of Physics and AstronomyShanghai Jiao Tong UniversityShanghai 200240China Shanghai Research Center for Quantum Sciences Shanghai 201315China Interdisciplinary Center for Quantum Information and Zhejiang Province Key Laboratory of Quantum Technology and Device Department of PhysicsZhejiang UniversityHangzhou 310027China InternationalCenter for Quantum Materials and School of Physics Peking UniversityBeijing 100871China International Quantum Academy Shenzhen 518048China Department of Mechanical Engineering Institute for Physical Science and TechnologyUniversity of MarylandCollege ParkMD 20742USA Collaborative Innovation Center of Light Manipulation and Applications Shandong Normal UniversityJinan 250358China

Measuring topological invariants is an essential task in characterizing topological phases of *** are usually obtained from the number of edge states due to the bulk-edge correspondence or from interference since they are integrals of the geometric phases in the energy *** is commonly believed that the bulk band structures could not be directly used to obtain the topological ***,we implement the experimental extraction of Zak phase from the bulk band structures of a Su-Schrieffer-Heeger(SSH)model in the synthetic frequency *** synthetic SSH lattices are constructed in the frequency axis of light,by controlling the coupling strengths between the symmetric and antisymmetric supermodes of two bichromatically driven *** measure the transmission spectra and obtain the projection of the time-resolved band structure on lattice sites,where a strong contrast between the non-trivial and trivial topological phases is *** topological Zak phase is naturally encoded in the bulk band structures of the synthetic SSH lattices,which can hence be experimentally extracted from the transmission spectra in a fiber-based modulated ring platform using a laser with telecom *** method of extracting topological phases from the bulk band structure can be further extended to characterize topological invariants in higher dimensions,while the exhibited trivial and non-trivial transmission spectra from the topological transition may find future applications in optical communications.

关键词： topological trivial synthetic

来源：评论

学校读者我要写书评

暂无评论

Active beam steering enabled by photonic crystal surface emitting laser

Active beam steering enabled by photonic crystal surface emi...

引用

2023 Opto-Electronics and communications Conference, OECC 2023

作者： Si, Jiahao Wang, Mingjin Chen, Zihao Xu, Yuanbo Chen, Jingxuan Zhang, Zheng Liu, Wenzhen Peng, Chao Zheng, Wanhua Institute of Semiconductors CAS Laboratory of Solid State Optoelectronics Information Technology Beijing China Institute of Semiconductors CAS Laboratory of Solid State Optoelectronics Information Technology State Key Laboratory on Integrated Optoelectronics Beijing China Peking University State Key Laboratory of Advanced Optical Communication Systems and Networks Department of Electronics & Frontiers Science Center for Nano-optoelectronics Beijing China Huawei Technologies Co. Ltd. Wuhan China Peng Cheng Laboratory Shenzhen China Institute of Semiconductors CAS College of Future Technology Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of Sciences Laboratory of Solid State Optoelectronics Information Technology State Key Laboratory on Integrated Optoelectronics Beijing China

A dynamically controlled beam steering photonic crystals surface-emitting laser is proposed in this work. We demonstrate its fast beam steering across a range of 3.2° × 4° in a time scale of 500 nanosec... 详细信息

ISBN: (纸本)9781665462136

关键词： Surface emitting lasers

来源：评论

学校读者我要写书评

暂无评论

Simultaneous quantum and classical communication via multiparameter modulation

引用

Physical Review A 2024年第3期109卷 032621-032621页

作者： Piao Tan Tao Wang Huanxi Zhao Zicong Tan Peng Huang Guihua Zeng Northwest University Xi'an 710127 Shaanxi China State Key Laboratory of Advanced Optical Communication Systems and Networks Center of Quantum Sensing and Information Processing Shanghai Jiao Tong University Shanghai 200240 China College of Information Science and Technology Northwest University Xi'an 710127 Shaanxi China

Classical and quantum communication protocols share similarities in terms of signal modulation, transmission, and reception, providing a basis for their integration. The integration of these protocols can lead to high-efficiency and low-cost performance by utilizing a single set of communication infrastructures to simultaneously achieve continuous-variable quantum key distribution and classical communication on a single wavelength. In this paper, we propose a simultaneous quantum and classical communication (SQCC) protocol based on multiparameter modulation, which combines pulse position modulation (PPM) for classical communication and Gaussian-distributed modulation (GM) for quantum key distribution, named GMCS-PPM-SQCC protocol. Classical information is transmitted using the arrival time parameter of the coherent state, while quantum key information is distributed through the two quadrature components of the coherent state. Coherent detection is used to detect all three parameters, and different data processing schemes are utilized to extract the corresponding information. We verified the feasibility of the protocol through simulations, discussed its secure transmission distance, bit error rate, and secret key rate in realistic scenarios. Our protocol has better phase noise tolerance than traditional SQCC protocol. It can further facilitates the integration of classical and quantum communication, and contributes to the deployment and application of QKD.

关键词： Quantum communication Quantum information processing Quantum protocols

来源：评论

学校读者我要写书评

暂无评论

Time-interval Measurement with Linear optical Sampling at the Femtosecond Level

arXiv

引用

arXiv 2023年

作者： Yu, Dongrui Chen, Ziyang Yang, Xuan Xu, Yunlong Jin, Ziyi Ma, Panxue Zhang, Yufei Yu, Song Luo, Bin Guo, Hong State Key Laboratory of Advanced Optical Communication Systems and Networks School of Electronics Center for Quantum Information Technology Peking University Beijing100871 China State Key Laboratory of Information Photonics and Optical Communications Beijing University of Posts and Telecommunications Beijing100876 China

High-precision time-interval measurement is a fundamental technique in many advanced applications, including time and distance metrology, particle physics, and ultra-precision machining. However, many of these applications are confined by the imprecise time-interval measurement of electrical signals, restricting the performance of the ultimate system to a few picoseconds, which limits ultra-high-precision applications. Here, we demonstrate an optical means of the time-interval measurement of electrical signals that can successfully achieve femtosecond (fs)-level precision. The setup is established using the optical-frequency-comb (OFC)-based linear optical sampling technique to realize timescale-stretched measurement. We achieve the measurement precision of 82 fs for a single LOS scan measurement and 3.05 fs for the 100-times average with post-processing, which is three orders of magnitude higher than the results of older electrical methods. The high-precision time interval measurement of electrical signals can substantially improve precision measurement technologies. © 2023, CC BY.

关键词： Signal sampling

来源：评论

学校读者我要写书评

暂无评论

The manipulation of ultracold atoms of high orbitals in optical lattices

arXiv

引用

arXiv 2022年

作者： Jin, Shengjie Chen, Xuzong Zhou, Xiaoji State Key Laboratory of Advanced Optical Communication System and Network School of Electronics Peking University Beijing China

Ultracold atoms in optical lattices are a powerful tool for quantum simulation, precise measurement, and quantum computation. A fundamental problem in applying this quantum system is how to manipulate the higher bands or orbitals in Bloch states effectively. Here we mainly review our methods for manipulating high orbital ultracold atoms in optical lattices with different configurations. Based on these methods, we construct the atom-orbital qubit under nonadiabatic holonomic quantum control and Ramsey interferometry with trapped motional quantum states. Then we review the observation of the novel quantum states and the study of the dynamical evolution of the high orbital atoms in optical lattices. The effective manipulation of the high orbitals provides strong support for applying ultracold atoms in the optical lattice in many fields. Copyright © 2022, The Authors. All rights reserved.

关键词： optical lattices

来源：评论

学校读者我要写书评

暂无评论

On-chip ultraviolet second-harmonic generation in lithium-tantalate thin film microdisk

引用

Chinese Optics Letters 2023年第6期21卷 89-93页

作者：薛苗颜雄硕吴江威葛睿袁汀格陈玉萍陈险峰 State Key Laboratory of Advanced Optical Communication Systems and Networks School of Physics and AstronomyShanghai Jiao Tong UniversityShanghai 200240China Shanghai Research Center for Quantum Sciences Shanghai 201315China Collaborative Innovation Center of Light Manipulations and Applications Shandong Normal UniversityJinan 250358China

The compact and reliable ultraviolet[UV]source has attracted remarkable attention for its potential use in optical measurement systems,high-density optical storage,and biomedical *** demonstrate ultraviolet generation by frequency doubling in a lithium-tantalate-on-insulator[LTOI]microdisk via modal phase *** 50-μm-diameter microdisk was milled by a focused ion beam[FIB]and followed by chemo-mechanical polishing[CMP]to smooth the disk surface and edge,and the Q-factor reaches 2.74×10~5in the visible ***-chip UV coherent light with a wavelength of384.3 nm was achieved,which shows great promise for using LTOIs in integrated ultraviolet source platforms.

关键词： lithium-tantalate thin film ultraviolet light second-harmonic generation

来源：评论

学校读者我要写书评

暂无评论

A 3D cluster-based channel model with time-space consistency (invited paper)

A 3D cluster-based channel model with time-space consistency...

引用

2021 IEEE/CIC International Conference on communications in China, ICCC 2021

作者： Huang, Ziwei Cheng, Xiang School of Electronics Engineering and Computer Science Peking University State Key Laboratory of Advanced Optical Communication Systems and Networks Department of Electronics Beijing100871 China

ISBN: (纸本)9781665443852

This paper proposes a novel three-dimensional (3D) cluster-based sixth-generation (6G) model for millimeter wave (mmWave) massive multiple-input multiple-output (MIMO) channels. In the proposed model, a novel method based on visibility region (VR) is developed, where the smooth and consistent birth and death of clusters in both the time domain and space domain are successfully captured. By using the developed method, the space-time non-stationarity and time-space consistency of channels can be modeled for the first time. Based on the proposed model, important channel statistical properties are derived and thoroughly investigated. Simulation results demonstrate that the smooth birth and death of clusters, time-space consistency, and space-time non-stationarity are modeled sufficiently. © 2021 IEEE.

关键词： Millimeter waves

来源：评论

学校读者我要写书评

暂无评论

Compact 780-nm Rb optical Clock

arXiv

引用

arXiv 2025年

作者： Chen, Zhendong Liu, Tianyu Yang, Qiaohui Wang, Ya Miao, Jie Chen, Jingming Pan, Duo Yang, Ruoao Wu, Jianjun Zhang, Zhigang Chen, Jingbiao Cao, Shiying State Key Laboratory of Advanced Optical Communication Systems and Networks School of Electronics Peking University Beijing100871 China Division of Time and Frequency Metrology National Institute of Metrology Beijing100013 China Hefei National Laboratory Hefei230088 China

We demonstrated a compact 780 nm rubidium optical clock, which includes an optical frequency standard and an optical frequency comb, with an optical volume of 11. 6 liters. Unlike the 778 nm rubidium atomic clocks based on two-photon transition, here, the laser frequency is stabilized to the hyperfine transitions of the 87Rb 5S1/2 F=2→5P3/2 F’=3, using modulation transfer spectroscopy (MTS). This approach effectively eliminates Doppler background and provides a high signal to noise ratio and high sensitivity. A nearly 300 MHz microwave signal, whose phase exactly tracks that of the optical frequency standard, is generated via the optical frequency comb, yielding a frequency instability of 1.91 E-13 @1 s and 5.29 E-14 @1000 s in the electronic domain. To the best of our knowledge, this is the most precise frequency stabilization result for the first-excited-state transition of alkali metal atoms to date and represents the first optical clock based on this transition. These results offer a promising approach for the development of portable optical *** Codes 14J60 Copyright © 2025, The Authors. All rights reserved.

关键词： Two photon processes

来源：评论

学校读者我要写书评

暂无评论

Experimental upstream transmission of continuous variable quantum key distribution access network

arXiv

引用

arXiv 2023年

作者： Wang, Xiangyu Chen, Ziyang Li, Zhenghua Qi, Dengke Yu, Song Guo, Hong State Key Laboratory of Information Photonics and Optical Communications Beijing University of Posts and Telecommunications Beijing100876 China State Key Laboratory of Advanced Optical Communication Systems and Networks School of Electronics Center for Quantum Information Technology Peking University Beijing100871 China

Continuous-variable quantum key distribution which can be implemented using only low-cost and off-the-shelf components reveals great potential in the practical large-scale realization. Access network as a modern network necessity, connects multiple end-users to the network backbone. In this work, we demonstrate the first upstream transmission quantum access networks using continuous-variable quantum key distribution. A two-end-user quantum access network is then experimentally realized. Through phase compensation, data synchronization and other technical upgrades, we achieve 390kbps secret key rate of the total network. In addition, we extend the case of two-end-user quantum access network to the case of multiple users, and analyze the network capacity in the case of multiple users by measuring the additive excess noise from different time slots. © 2023, CC BY.

关键词： Quantum cryptography

来源：评论

学校读者我要写书评

暂无评论

Low-threshold bistable reflection assisted by oscillating wave interaction with Kerr nonlinear medium

引用

Chinese Physics B 2021年第8期30卷 364-369页

作者： Yingcong Zhang Wenjuan Cai Xianping Wang Wen Yuan Cheng Yin Jun Li Haimei Luo Minghuang Sang Jiangxi Key Laboratory of Photoelectronics and Telecommunication Department of PhysicsJiangxi Normal UniversityNanchang 330022China State Key Laboratory of Advanced Optical Communication Systems and Networks Shanghai Jiao Tong UniversityShanghai 200240China Jiangsu Key Laboratory of Power Transmission and Distribution Equipment Technology Hohai UniversityChangzhou 213022China Department of Physics Jiangxi Normal University Science and Technology CollegeNanchang 330022China

Owing to the enormously enhanced oscillating wave,a minute variation of the incident light intensity will give rise to a change in the dielectric constant of the Kerr nonlinear medium and lead to a bistable reflection with an ultra-low threshold intensity,which is closely related to the angle of incidence and the thickness of the Kerr nonlinear *** criterion for the existence of optical bistability is *** bistability scheme is simple and not limited to the TM-polarization.

关键词： optical bistability waveguide nonlinear optics Kerr nonlinear material

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：