Squeezing Light via Levitated Cavity Optomechanics

Abstract

Squeezing light is a critical resource in both fundamental physics and precision measurement. Squeezing light has been generated through optical-parametric amplification inside an optical resonator. However, preparing the squeezing light in an optomechanical system is still a challenge for the thermal noise inevitably coupled to the system. We consider an optically levitated nano-particle in a bichromatic cavity, in which two cavity modes could be excited by the scattering photons of the dual tweezers, respectively. Based on the coherent scattering mechanism, the ultra-strong coupling between the cavity field and the torsional motion of nano-particle could be achieved for the current experimental conditions. With the back-action of the optically levitated nano-particle, the broad single-mode squeezing light can be realized in the bad cavity regime. Even at room temperature, the single-mode light can be squeezed for more than 17 dB, which is far beyond the 3 dB limit. The two-mode squeezing light can also be generated, if the optical tweezers contain two frequencies, one is on the red sideband of the cavity mode, the other is on the blue sideband. The two-mode squeezing can be maximized near the boundary of the system stable regime and is sensitive to both the cavity decay rate and the power of the optical tweezers.

On the Interaction of Massive Photons and Mechanical Oscillators in Cavity Optomechanics: Basic Model and Quantization

“…[6] For example, it presents a powerful framework for precision sensors, [7] ground-state cooling, [8,9] and quantumstate generation. [10,11] In particular, it allows the exploration of quantum effects in macroscopic objects by creating quantum states of mechanical motion, such as squeezed states [12][13][14] or entangled states. [15][16][17] These states can exhibit behaviors that are distinctly different from classical mechanical systems.…”

Coupling of QD-based PhC nanocavity with two mechanical modes: an approach to tunable optical switching and sensing applications

“…The emerging field of cavity optomechanical systems (COMSs), which studies the radiation pressure interaction between optical and mechanical degrees of freedom, has made significant advancements in recent years, including the realisation of non-classical or squeezed light [17][18][19][20][21], phonon cooling [22][23][24][25], ultrasensitive sensing [26], phonon squeezing [27], phonon laser [28,29], and slow light [30][31][32]. When multi-mechanical resonators are constructed inside an optical cavity, cooperative response, switching properties, improved interactions, and nontrivial characteristics emerge [33][34][35][36][37][38][39][40].…”