Tengfang Kuang

Abstract Squeezing, an effective approach to reduce noise in one quadrature while increasing it in the orthogonal quadrature, has attracted broad attention to enhance the performance of mechanical oscillators in their thermal or ground states. However, the classical squeezing of phonon lasers, mechanical analogs of optical lasers, has not been achieved.

Abstract Phonon lasers, which exploit coherent amplifications of phonons, are a means to explore nonlinear phononics, image nanomaterial structures and operate phononic devices. Recently, a phonon laser governed by dispersive optomechanical coupling has been demonstrated by levitating a nanosphere in an optical tweezer. Such levitated optomechanical devices, with minimal noise in high vacuum, can allow flexible control of large-mass objects without any internal discrete energy levels.

Abstract The intracavity optical tweezers is a new, to the best of our knowledge, cavity optomechanics system, implementing a self-feedback control of the particle’s position by trapping the particle inside an active ring cavity. This self-feedback mechanism efficiently constructs a novel potential in the cavity. Here we predict and give experimental evidence for the self-feedback induced optical bistability in dual-beam intracavity optical tweezers.