Near-field optomechanical transduction enhanced by Raman gain
Optics Express(2024)
摘要
Raman-gain-enhanced near-field optomechanical transduction between a movable
optical cavity and SiN-membrane resonator is demonstrated. The Raman gain
compensates for the intrinsic loss of the cavity and amplifies the
optomechanical transduction, through which the membrane vibration is sensed
using a high-Q whispering-gallery-mode optical cavity evanescently. The optical
Q of the cavity resonance is improved with respect to the optical pump power,
which results in an increase in the optomechanically transduced vibration
signals of the mechanical resonator. Our near-field optomechanical coupling
approach with optical gain realizes highly sensitive displacement measurement
in nano- and micro-mechanical resonators consisting of arbitrary materials and
structures.
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