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Influence of Combination of Casimir Force and Residual Stress on the Behaviour of Micro-and Nano-electromechanical systems

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Chinese Physics Letters 2002年第6期19卷 832-834页

作者： Zheng Mao-Sheng, Zhou Gen-Shu State Key Laboratory for Mechanical Behavior of Materials Xi"an Jiaotong University

Casimir force and residual stresses actually appear in over-layers or films simultaneously. The study of the behaviour of micro- and nano-electromechanical systems in the presence of Casimir force and residual stress is of significance to the design of the relevant devices. We derive analytical expressions of the deflection of a bridge-shaped device under the mutual actions of Casimir force and residual stress in films. It is shown that the tensile residual stress enhances wavy behaviour of the deflection, while the compressive residual stress increases the deflection value and reduces the wavy behaviour.

关键词： tensile residual stress Residual stress compressive residual stress Nanoelectromechanical systems Deflection micro Casimir effect electromechanical systems

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Electrically controlled optical switch in the hybrid opto-electromechanical system

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Chinese Physics B 2017年第12期26卷 622-627页

作者：秦立国王中阳马鸿洋王淑梅龚尚庆 School of Science Qingdao University of Technology Shanghai Advanced Research Institute Chinese Academy of Sciences Department of Physics East China University of Science and Technology

To promote the future quantum information technologies, we demonstrate an electrically driven optical switch based on quantum interference in a hybrid opto-electromechanical system, which consists of an opto-mechanical cavity and an external electric circuit. The key element of our scheme is a moveable mirror of cavity as a charged mechanical oscillator capacitively coupled to a fixed charged plate in a variable capacitor. By adjusting the voltage of the capacitor, the displacement of the moveable mirror is modulated, then the cavity field can be electrically turned on or off due to the detuning of the cavity. Based on the cavity induced transparency, the transparency window can be electrically switched on or off by turning on or off the cavity field. Therefore, the susceptibility of the medium in the cavity can be electrically controlled, i.e., the scheme of the electrically controlled absorption switching can be demonstrated. This electrically driven optical switch will excite a development trend and implementation prospect towards the integration and miniaturization of quantum module device in a chip.

关键词： electromechanical systems cavity induced transparency optical switch

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