Optomechanical microcavity structure, measurement system and method with nonlinear mechanical oscillator

Abstract

The invention discloses an optomechanical microcavity structure containing a nonlinear mechanical oscillator, a measurement system and a method, and belongs to the field of micro-nano optoelectronic microcavity sensing. In the optomechanical microcavity composed of two one-dimensional photonic crystal micro-nanobeams, the movable micro-nanobeams are designed in a nonlinear mechanical oscillator, and the microdisk microcavity is used to monitor the movement of the microprobes to realize non-linear The displacement of the linear mechanical oscillator is measured to realize the experimental research on the nonlinear optical-mechanical coupling characteristics of the optical force-driven cavity integrated on the all-optical chip; at the same time, a coupling method based on two-way micro-nano fiber-optical microcavity is also designed Used to realize optical-mechanical coupled pumping and displacement detection simultaneously, the all-optical detection system can effectively observe nonlinear phenomena in optomechanical microcavity systems. For the first time, a design that introduces a nonlinear mechanical oscillator into an optomechanical microcavity is proposed, and at the same time, the observation of nonlinear phenomena under the action of optical-mechanical coupling is realized through experimental measurements.

Description

technical field [0001] The invention relates to the technical field of micro-nano optoelectronic micro-cavity sensing, in particular to an opto-mechanical micro-cavity structure containing nonlinear mechanical oscillators, a measurement system and a method. Background technique [0002] An optomechanical microcavity is a micro-nano system designed based on the photon-phonon interaction of optical microcavity energy and mechanical microcavity energy, which is used to study the rich optical / mechanical resonance characteristics and light- mechanical coupling properties. The optical microcavity structure can confine the light field energy in the micro-nano-sized structure to achieve high optical resonance Q value, and the optical gradient force generated when the concentrated light field energy is applied to the semiconductor silicon material can make the microcavity structure itself displace . [0003] When this microcavity structure is applied to a mechanical oscillator supp...

AI Technical Summary

Problems solved by technology

These theoretical models have numerically solved and analyzed the optomechanical microcavity based on the nonlinear mechanical oscillator, and theoretically analyzed that the nonlinear mechanical oscillator will cause a large displacement of the optomechanical microcavity after being driven by a strong optical force. Nonlinear phenomena (such as photomechanical induced transparency, parametric photo-mechanical vibration, frequency synthesis of different mechanical oscillators, etc.), but have not yet been demonstrated from the experimental system

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