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Optoelectronics Letters 2022年第3期18卷 135-142页

作者： DI Ke WANG Wenbo CUI Wei GUO Junqi LIU Yu DU Jiajia Chongqing engineering Research Center of Intelligent Sensing Technology and Microsystem Chongqing University of Post and TelecommunicationsChongqing 400065China

In this paper, we investigate the quantum fluctuations of subharmonic reflected field from a triple-resonant degenerate optical parametric amplifier(OPA) inside coupled optical resonators, which is driven by the squeezed beam at signal frequency. By controlling the relative phase between the pump beam and the injected signal beam, we can see the quantum fluctuation in the phase direction and amplitude direction due to the parametric down-conversion process in the cavity. Thus, the phase sensitive operation of the compression field is realized due to the quantum interference between the harmonic field of the down converter of OPA and the inner field of the coupled optical resonator. We verified the quantum coherent phenomena of OPA in coupled optical resonators and phase-sensitive manipulations of quantum entanglement for quantum information processing. We realized the electromagnetically induced transparency-like(eit-like) effect and the optical parameter conversion process at the same time in one optical device. These properties can favor higher manipulation precision and control efficiency, which is more suitable for the integration of quantum-on-chip systems, laying a foundation for the practical application of quantum information.

关键词： quantum parametric degenerate

Nanomechanical properties and fracture toughness of hard ceramic layer produced by gas boriding of Inconel 600 alloy

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Transactions of Nonferrous Metals Society of China 2020年第2期30卷 428-448页

作者： N.MAKUCH Institute of Materials Science and engineering Poznan University of Technology

Gas-boriding in N2-H2-BCl3 atmosphere resulted in the formation of a thick layer on Inconel 600 *** microstructure of layer produced at 920℃for 2 h consisted of a mixture of chromium borides and nickel *** objective of investigations was to determine the influence of the chemical and phase compositions of borided layer on its mechanical *** nanoindentation was carried out using Berkovich diamond tip under a load of 50 m *** gas-borided layer was characterized by high indentation hardness HIT from 1542.6 HV to 2228.7 HV and high elastic modulus eit from 226.9 to 296.4 *** was found that the mixture with higher percentage of chromium borides was the reason for the increase in HIT and eit *** fracture toughness(KC)was measured using Vickers microindentation technique under a load of 0.98 *** presence of high compressive stresses in normal direction to the top surface caused the strong anisotropy of the borided layer,in respect of fracture *** high difference between the lowest(0.5763 MPa·m^1/2)and the highest(4.5794 MPa·m^1/2)fracture toughness was *** situation was caused by the differences in chemical and phase compositions of tested areas,presence of porosity and residual ***,the higher KC values were obtained in areas with lower chromium content.

关键词： gas boriding borided layer hardness elastic modulus fracture toughness

Electromagnetically induced transparency in novel dual-band metamaterial excited by toroidal dipolar response

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Frontiers of physics 2020年第1期15卷 9-15页

作者： Zhao-Yang Shen He-Lin Yang Xuan Liu Xiao-Jun Huang Tian-Yu Xiang Jiong Wu Wei Chen College of Physical Science and Technology Central China Normal UniversityWuhan 430079China College of Communication and Information engineering Xi’an University of Science and TechnologyXi’an 710054China School of Computer and Information China Three Gorges UniversityYichang 443002China School of Mechanical and Electrical engineering Guizhou Normal UniversityGuiyang 550000China

We demonstrated a novel metamaterial with dual-band electromagnetically induced transparency(eit)via simulation,experiment and numerical analysis,with resonance frequencies of the trans-parency peaks of 7.60 and 10.27 *** E-εmetamaterial unit cells were composed of E-shaped and e-shaped *** analyzing the surface current distribution and the magnetic field,we qualitatively verified the toroidal dipole response in the E-εmetamaterial at 10.27 ***,by calculating the multipole's radiated power,we found that the two transparency peaks were due to the excitation of the electric and toroidal dipole *** changing the incident angle from 0°to 60°,we observed changes in transmission spectra,and the quality factors(Q-factors)of the two transparency peaks *** addition,the proposed E-εmetamaterial can be designed to act as a refractive index sensor or other electronic equipment for the control of electromagnetic waves.

关键词： metamaterial dual band electromagnetically induced transparency toroidal dipole response

Incident Light Influence on the Transmission of Coupled Ring Resonators

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Tsinghua Science and Technology 2010年第2期15卷 198-201页

作者：孙月徐连宇彭超李正斌 State Key Laboratory on Advanced Optical Communication Systems & Networks School of Electronic Engineering and Computer Science Peking University

The transmission matrix method is used to analyze the influence of incident light on coupled resonators. Two different types of incident light on the same coupled resonator geometry are shown to lead to different system transmission features. The eit-like phenomenon occurs in the type I case with the transmission being symmetric around the zero-single-pass-phase-shift frequency. In the type Ⅱcase the resonant frequency has a blue shift corresponding to the increasing coupling strength between the two ring resonators. Also, the critical-coupling-like condition exists in the type Ⅱconfiguration to maintain the zero-single pass-phase-shift frequency. The incident light, as well as the geometry, partially determine the mode interference in the coupled ring resonator system.

关键词： coupled ring resonator mode excitation resonance frequency shift

Fidelity of light storage in warm atomic gases at different storage time

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Chinese Optics Letters 2010年第1期8卷 1-3页

作者：齐越蓉高宏张首刚 National Time Service Center Chinese Academy of Sciences Non-equilibrium Condensed Matter and Quantum engineering Laboratory the Key Laboratory of Ministry of EducationXi'an Jiaotong University

The fidelity of light with arbitrary polarizations stored in a warm STRb atomic vapor at different storage time is studied. The exponential decay of regeneration efficiency with the storage time is observed and a detectable signal at 300-us storage time is still existed. The storage fidelity at different storage time is well maintained in our experiment.

关键词： Fidelity of light storage in warm atomic gases at different storage time eit PDI

HIGH SPEED OPTICAL LAN BASED ON SCM-WDM TECHNIQUES

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HIGH SPEED OPTICAL LAN BASED ON SCM-WDM TECHNIQUES

Continuous-wave four-wave mixing with linear growth based on elect romagnetically dual induced transparency

计算机，通信，控制与电力工程国际会议

作者： Lu Chao Siew Chee Kheong B. Wilson Z. Ghassemlooy School of Electronic Eng. Nanyang Technological Univ. Nanyang Ave. Singapore 2263 Dept. of Electronic Eng. UMIST Manchester M60 1QD EnglandU. K School of eit Sheffield Hallam Univ. Sheffield S1 1WB England U. K

*** The rapid advancement of optical communication technology and the ever emergence of various broadband services have created a need for some fundamental change in the design of optical fibre based local area network. Present day's optical networks using a single optical wavelength and intensity modulation of optical power are fundamentally the same as networks based on coaxial *** such optical networks optical fibres are only used as high speed transmission mediums while signal

关键词： WDM origin HIGH SPEED OPTICAL LAN BASED ON SCM-WDM TECHNIQUES SCM LAN

来源： cnki会议评论

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Chinese Optics Letters 2004年第7期2卷 418-420页

作者：李家华杨文星彭菊村 Department of Physics Huazhong University of Science and Technology Wuhan 430074 Centre for Cold Atom Physics Wuhan Institute of Physics and Mathematics Chinese Academy of Sciences Wuhan 430071 Department of Physics Xiaogan Normal University Xiaogan 432100sing Schrodinger-Maxwell formalism we propose and analyze a continuous-wave four-wave mixing (FWM) scheme for the generation of coherent light in a six-level atomic system based on electromag-netically dual induced transparency. We derive the corresponding explicit analytical expressions for the generated mixing field. We find that the scheme greatly enhances FWM production efficiency and is also capable of inhibiting and delaying the onset of the detrimental three-photon destructive interference by choosing the proper decay rate in the second electromagnetically induced transparency (EIT) process. In addition such an optical process also provides possibilities for producing short-wave-length coherent radiation at low pump intensities.

Using Schrodinger-Maxwell formalism, we propose and analyze a continuous-wave four-wave mixing (FWM) scheme for the generation of coherent light in a six-level atomic system based on electromag-netically dual induced transparency. We derive the corresponding explicit analytical expressions for the generated mixing field. We find that the scheme greatly enhances FWM production efficiency and is also capable of inhibiting and delaying the onset of the detrimental three-photon destructive interference by choosing the proper decay rate in the second electromagnetically induced transparency (eit) process. In addition, such an optical process also provides possibilities for producing short-wave-length coherent radiation at low pump intensities.

关键词： Coherent light Continuous wave lasers Electromagnetic field effects Transparency

Observation of intracavity electromagnetically induced transparency in Cs vapor coupled with a standing-wave cavity

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Chinese Optics Letters 2017年第8期15卷 66-70页

作者：周海涛车少娜左鹏程韩宇宏王丹 College of Physics and Electronics engineering' Shanxi University Taiyuan 030006 China

Cavity quantum electrodynamics （QED） is mainly re- searching the interaction process with a coherent atomic medium placed inside an optical resonant cavity, and has been of great interest in recent years. A well-known cavity- QED effect is the vacuum Rabi splitting or normal-mode splitting phenomenon that is under the strong coupling condition,

关键词： mode Observation of intracavity electromagnetically induced transparency in Cs vapor coupled with a standing-wave cavity wave eit Cs

Double transmission peaks electromagnetically induced transparency induced by simultaneously exciting the electric and magnetic resonance in one unit cell

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Chinese Physics B 2015年第8期24卷 335-339页

作者：刘思源郑步生李海明刘晓春刘少斌 Key Laboratory of Radar Imaging and Microwave Photonics Ministry of Education College of Electronic and Information EngineeringNanjing University of Aeronautics and Astronautics The Aeronautical Science Key Laboratory for High Performance Electromagnetic Windows

In this paper, we investigate a metamaterial formed by a planar array of a metallic L-shaped structure and a cut wire(CW), which behaves as an analogue of the electromagnetically induced transparency(eit). The double transmission peaks are formed by the destructive interference of two bright-modes and a quasi-dark mode. The two bright-modes are respectively excited by the L-shaped structure and CW. The unit structure itself performs a quasi-dark mode. The group refractive indexes are over 20 in the first transmission peak, and 117 in the second transmission peak, thus offering potential applications in slow light devices. Finally, all the above characteristics are achieved in just one simple unit cell.

关键词： electromagnetically induced transparency double transmission peaks

Artificial intelligence for closed-loop ventilation therapy with hemodynamic control using the open lung concept

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International Journal of Intelligent Computing and Cybernetics 2015年第1期8卷 50-68页

作者： Anake Pomprapa Danita Muanghong Marcus Köny Steffen Leonhardt Philipp Pickerodt Onno Tjarks David Schwaiberger Burkhard Lachmann Helmholtz-Institute for Biomedical engineering RWTH Aachen UniversityAachenGermany Department of Anesthesiology and Intensive Care Medicine Charité–University Medicine BerlinBerlinGermany

Purpose–The purpose of this paper is to develop an automatic control system for mechanical ventilation therapy based on the open lung concept(OLC)using artificial *** addition,mean arterial blood pressure(MAP)is stabilized by means of a decoupling controller with automated noradrenaline(NA)dosage to ensure adequate systemic perfusion during ventilation therapy for patients with acute respiratory distress syndrome(ARDS).Design/methodology/approach–The aim is to develop an automatic control system for mechanical ventilation therapy based on the OLC using artificial *** addition,MAP is stabilized by means of a decoupling controller with automated NA dosage to ensure adequate systemic perfusion during ventilation therapy for patients with ***–Thisinnovativeclosed-loop mechanicalventilation system leadsto a significant improvement in oxygenation,regulates end-tidal carbon dioxide for appropriate gas exchange and stabilizes MAP to guarantee proper systemic perfusion during the ventilation *** limitations/implications–Currently,this automatic ventilation system based on the OLC can only be applied in animal trials;for clinical use,such a system generally requires a mechanical ventilator and sensors with medical approval for *** implications–For implementation of a closed-loop ventilation system,reliable signals from the sensors are a prerequisite for successful ***/value–Theexperiment with porcine dynamics demonstrates thefeasibility and usefulness of this automatic closed-loop ventilation therapy,with hemodynamic control for severe ***,this pilot study validated a new algorithm for implementation of the OLC,whereby all control objectives are fulfilled during the ventilation therapy with adequate hemodynamic control of patients with ARDS.

关键词： Artificial intelligence Acute respiratory distress syndrome(ARDS) Closed-loop mechanical ventilation Electrical impedance tomography(eit) Hemodynamic control Open lung concept