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Propagation properties of the terahertz waveguide using a metallic nanoslit narrower than skin depth

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Chinese Optics Letters 2016年第7期14卷 90-93页

作者：杨洁林功伟钮月萍祁义红周凤雪龚尚庆 Department of Physics East China University of Science and Technology

A terahertz （THz） waveguide using a metallic nanoslit whose width is much smaller than the skin depth is analytically investigated. By taking some important physical properties into account, we derive a simple, yet accurate, expression for the effective index. We also study the changes in modal field and the attenuation coefficient in the whole THz region, and find some interesting physical properties. Finally, we verify that these theoretical analyses coincide with the rigorous nmnerical simulations. This research can be useful for various applications of THz waveguides made of metallic nanoslits.

关键词： Frequency bands Nanostructures Physical properties

Two-atom distributed entanglement by detecting the transmission spectrum of a coupled-cavity quantum electrodynamics system

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Chinese Optics Letters 2015年第9期13卷 73-76页

作者：钟啸林林功伟周凤雪钮月萍龚尚庆 Department of Physics East China University of Science and Technology

A scheme is presented to generate atomic entanglement by detecting the transmission spectrum of a coupled- cavity system. In the scheme, two 3-level atoms are trapped in separate cavities coupled by a short optical fiber, and the atomic entanglement could be realized in a heralded way by detecting the transmission spectrum of the coupled-cavity system.

关键词： Atoms Electrodynamics Optical fibers Quantum electronics Quantum theory

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原子相干引起的五阶非线性增强

光学学报 2017年第7期37卷 203-209页

作者：刘羽桐钮月萍林功伟龚尚庆华东理工大学理学院上海200237

采用腔透射谱法测量了Λ型三能级系统的五阶克尔非线性系数。对二能级和Λ型三能级系统的五阶非线性系数进行数值模拟,比较发现,原子相干对非线性系数具有增强作用。同时将三阶和五阶极化率的模拟结果与测量结果进行对比,发现两者具有... 详细信息

采用腔透射谱法测量了Λ型三能级系统的五阶克尔非线性系数。对二能级和Λ型三能级系统的五阶非线性系数进行数值模拟,比较发现,原子相干对非线性系数具有增强作用。同时将三阶和五阶极化率的模拟结果与测量结果进行对比,发现两者具有很好的一致性。

关键词：非线性光学原子相干电磁诱导透明非线性系数腔透射谱法

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有源和无源的无磁非互易研究进展

光学学报 2022年第3期42卷 154-166页

作者：刘立峰胡依奇张示城祁义红林功伟钮月萍龚尚庆华东理工大学物理学院上海200237 华东理工大学材料科学与工程学院上海200237 福建师范大学物理与能源学院福建省量子调控与新能源材料重点实验室福建福州350108

根据洛伦兹互易定理,在通常的光学系统中,交换信号源和探测器的位置后接收到的光信号不变。这为光路设计和分析带来了方便。在全光通信和量子网络中,需要有效地控制光信号的定向传输以避免反射光对信号的干扰、分离相向传输的光信号等,... 详细信息

根据洛伦兹互易定理,在通常的光学系统中,交换信号源和探测器的位置后接收到的光信号不变。这为光路设计和分析带来了方便。在全光通信和量子网络中,需要有效地控制光信号的定向传输以避免反射光对信号的干扰、分离相向传输的光信号等,因此需要只允许光单向传输的非互易器件。以磁光隔离器为背景切入,简单介绍磁光领域的研究现状。重点从有源和无源两个方面对无磁非互易领域的发展进行综述,以展现量子光学在无磁非互易领域的重要应用。

关键词：量子光学洛伦兹互易磁光非互易无磁非互易有源器件无源器件

弱控制场作用下腔内电磁诱导透明及其线宽研究

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光学学报 2018年第7期38卷 317-321页

作者：吴嘉宝张示城胡依奇林功伟钮月萍龚尚庆华东理工大学理学院上海200237

基于腔内极化子的量子理论,实验研究了腔内电磁诱导透明(EIT)现象。通过升高铷气室温度,使铷原子数目大量增加。当系统满足集体强耦合条件时,利用弱控制场可实现EIT以及线宽的显著压窄。随着温度的继续升高,耦合效应增强,腔线宽被进一... 详细信息

基于腔内极化子的量子理论,实验研究了腔内电磁诱导透明(EIT)现象。通过升高铷气室温度,使铷原子数目大量增加。当系统满足集体强耦合条件时,利用弱控制场可实现EIT以及线宽的显著压窄。随着温度的继续升高,耦合效应增强,腔线宽被进一步压窄。

关键词：量子光学腔内电磁诱导透明腔内极化子腔线宽压窄集体强耦合

Cavity linewidth narrowing with dark-state polaritons

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Chinese Physics B 2016年第1期25卷 585-588页

作者：林功伟杨洁钮月萍龚尚庆 Department of Physics East China University of Science and Technology

We present a quantum-theoretical treatment of cavity linewidth narrowing with intracavity electromagnetically in- duced transparency （EIT）. By means of intracavity EIT, the photons in the cavity are in the form of cavity polaritons： bright-state polariton and dark-state polariton. Strong coupling of the bright-state polariton to the excited state induces an effect known as vacuum Rabi splitting, whereas the dark-state polariton decoupled from the excited state induces a narrow cavity transmission window. Our analysis would provide a quantum theory of linewidth narrowing with a quantum field pulse.

关键词： cavity electromagnetically induced transparency linewidth narrowing dark-state polariton

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媒体演示在基础物理实验教学中的应用

大学物理实验 2021年第3期34卷 123-126页

作者：林功伟许飞华东理工大学理学院上海200237

媒体演示改变了传统的教学方法,激活课堂气氛,创设学习情境,可以使抽象问题浅显易懂。实践表明,借助媒体演示,可以培养学生观察、分析、想象等能力,发展学生探究知识的能力,大大的提高了课堂教学质量与效果。

关键词：媒体演示实验教学示波器分光计磁滞回线

Direct implementation of a scalable non-local multi-qubit controlled phase gate via optical fibres and adiabatic passage

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Chinese Physics B 2008年第12期17卷 4388-4395页

作者：汤耀祥林秀敏林功伟陈立波黄秀花 School of Physics and Optoelectronics Technology Fujian Normal University

This paper presents a direct implementation scheme of the non-local multi-qubit controlled phase gate by using optical fibres and adiabatic passage. The smaller operation number for implementing the multi-qubit controlled phase gate and needlessness for addressing individually save physical resource and lower the difficulties of experiment. Mean- while, the scheme is immune from some decoherence effects such as the atomic spontaneous emission and fibre loss. In principle, it is scalable.

关键词： adiabatic passage multi-qubit controlled phase gate

Generation of multiple-particle cluster state via cavity QED

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Chinese Physics B 2008年第1期17卷 64-69页

作者：林功伟林秀敏陈立波杜茜华陈志华 School of Physics and Optoelectronics Technology Fujian Normal University

This paper proposes schemes for generating multiple-photon and multiple-atom cluster states, respectively. The schemes are based on the cavity input-output process and atomic or photonic states measurement, and the successful probabilities approach unity in the ideal case. The numerical simulations show that the produced multiple-particle cluster states have high fidelity even if the Lamb-Dicke condition is not satisfied. Some practical imperfections, such as atomic spontaneous emission and output coupling inefficiency, only decrease the success probability but exert no influence on the fidelity of generated multiple-particle cluster states. From the experimental point of view, smaller operation number and lack of need for individual addressing keeps the schemes easy to implement. These schemes may offer a promising approach to the generation of a large-scale cluster state.

关键词： cluster state cavity QED