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superfluorescence CHARACTERISTICS OF ER-DOPED SILICA FIBER

Chinese Science Bulletin 1992年第14期37卷 1224-1226页

作者：陈一竑程瑞华沈红卫干福熹 Shanghai Institute of Optics and Fine Mechanics Academia Sinica Shanghai 201800 PRC

The laser and amplifiers based on RE-doped fiber have been paid much attention to. Recently, fiber superfluorescence- the amplified spontaneous emission (ASE)began to receive more interest. As a broadband source, the superfluorescence is needed in many fiber sensor applications, in particular the fiber gyroscopes and some signal-processing fiber systems. Owing to the high gain in RE-doped fiber, significant superfluorescence power

关键词： Er-doped fiber fiber superfluorescence

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Perturbation-driven echo-like superfluorescence in perovskite superlattices

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Advanced Photonics 2023年第5期5卷 26-32页

作者： Qiangqiang Wang Jiqing Tan Qi Jie Hongxing Dong Yongsheng Hu Chun Zhou Saifeng Zhang Yichi Zhong Shuang Liang Long Zhang Wei Xie Hongxing Xu East China Normal University School of Physics and Electronic ScienceState Key Laboratory of Precision SpectroscopyShanghaiChina Chinese Academy of Sciences Shanghai Institute of Optics and Fine MechanicsKey Laboratory of Materials for High-Power LaserShanghaiChina Shanghai University Department of PhysicsShanghaiChina Wuhan University School of Physics and TechnologyCenter for Nanoscience and NanotechnologyWuhanChina University of Chinese Academy of Sciences Hangzhou Institute for Advanced StudyHangzhouChina Chongqing Institute of East China Normal University Chongqing Key Laboratory of Precision OpticsChongqingChina

The collective response of macroscopic quantum states under perturbation is widely used to study quantum correlations and cooperative properties,such as defect-induced quantum vortices in Bose–Einstein condensates and the non-destructive scattering of impurities in ***(SF),as a collective effect rooted in dipole–dipole cooperation through virtual photon exchange,leads to the macroscopic dipole moment(MDM)in high-density dipole ***,the perturbation response of the MDM in SF systems remains ***-like behavior is observed in a cooperative exciton ensemble under a controllable perturbation,corresponding to an initial collapse followed by a revival of the *** a dynamic response could refer to a phase transition between the macroscopic coherence regime and the incoherent classical state on a time scale of 10 *** echo-like behavior is absent above 100 K due to the instability of MDM in a strongly dephased exciton ***,the MDM response to perturbations is shown to be controlled by the amplitude and injection time of the perturbations.

关键词： superfluorescence polariton photoluminescence exciton

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Observation of Quantum Beat in Rb by Parametric Four-Wave Mixing

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Chinese Physics Letters 2007年第8期24卷 2234-2237页

作者：朱长军贺俊芳薛兵翟学军 Department of Physics School of Science Xi'an Polytechnic University Xi'an 710048 State Key Laboratory of Transient Optics and Photonics Xi'an Institute of Optics and Precision Mechanics Chinese Academy of Sciences Xi'an 710119

Two coupled paralnetric four-wave-mixing processes in Rb atoms are studied using perturbation theory, which reveals clear evidence of tile appearance of quantum beat at 608cm^-1, corresponding to the energy difference of the 7s - 5d states of Rb atoms, in the parametric four-wave-mixing signals. A pump-probe technique is utilized to observe the quantum beat. Tinle-varying characteristics of the quantum beat are investigated using time-dependellt Fourier transform. The results show that the time-varying characteistics of the quantum beat not oldy offers a sensitive detecting method for observing the decay of atomic wave packets, but also provides a potential tool for monitoriHg the dissociation of molecules.

关键词： COHERENT CONTROL WAVE-PACKETS VAPOR RUBIDIUM superfluorescence EXCITATION CONVERSION EMISSION

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Dynamics of cooperative emissions in a cascade three-level molecular system driven by an ultrashort laser pulse

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Chinese Physics B 2008年第11期17卷 4211-4217页

作者：刘纪彩王春兴 Gel’mukhanov Faris 王传奎 College of Physics and Electronics Shandong Normal University Jinan 250014 China Department of Theoretical Chemistry School of Biotechnology Royal Institute of Technology SE-10691 Stockholm Sweden

This paper investigates the dynamics of cooperative emissions in a cascade three-level system driven by an ultra, short laser pulse by solving numerically the full-wave Maxwell-Bloch equations. The 4, 4＇-bis（dimethylamino） stilbene molecule is used as the model molecule because of its strong two-photon absorption property. The two-colour cooperative emissions are studied as functions of molecular number density and dephasing rate of the dipole coherence. The propagation effects on the evolution of the cooperative radiations are also taken into account. The cooperative radiations are enhanced for large number density of the molecule, while the fast dephasing of the dipole coherence reduces the intensity of the cooperative radiations and delays the emission times or even inhibits the formation of the emissions. The delay time of the radiation decreases with the increase of the molecular number density and the propagation distance.

关键词： superfluorescence ultra-short laser pulse 4 4'-bis(dimethylamino) stilbene organic molecule Maxwell-Bloch equations

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