Transient Microcavity Sensor

Abstract

A transient and high sensitivity sensor based on high-Q microcavity is proposed and studied theoretically. There are two ways to realize the transient sensor: monitor the spectrum by fast scanning of probe laser frequency or monitor the transmitted light with fixed laser frequency. For both methods, the non-equilibrium response not only tells the ultrafast environment variance, but also enable higher sensitivity. As examples of application, the transient sensor for nanoparticles adhering and passing by the microcavity is studied. It's demonstrated that the transient sensor can sense coupling region, external linear variation together with the speed and the size of a nanoparticle. We believe that our researches will open a door to the fast dynamic sensing by microcavity.

9 pages, 5 figures

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Cited by in corpus (5)

• Whispering gallery microsensors: a review
• Cavity ring-up spectroscopy for dissipative and dispersive sensing in a whispering gallery mode resonator
• Label-free detection of single nanoparticles with disordered nanoisland surface plasmon sensor
• Cavity buildup dispersion spectroscopy
• Frequency stabilization via interference between transmitted and reflected lights from a reference cavity