Quantum control of fast/slow light in atom-assisted optomechanical cavity

In the unresolved sideband regime, we propose a scheme for cooling mechanical resonator close to its ground state in a three-cavity optomechanical system, where the auxiliary cavities are indirectly connected with the mechanical resonator through standard optomechanical subsystem. The standard optomechanical subsystem is driven by a strong pump laser field. With the help of the auxiliary cavities, the heating process is suppressed and the cooling process of the mechanical resonator is enhanced. More importantly, the average phonon number is much less than 1 in a larger range. This means that the mechanical resonator can be cooled down to its ground state. All these interesting features will significantly promote the physical realization of quantum effects in multi-cavity optomechanical systems.

Section: Model and Equationsmentioning

confidence: 99%

Ground-state cooling based on a three-cavity optomechanical system in the unresolved-sideband regime*

Wang¹

2021

“…[17] The optical force could be enhanced at the plasmonic resonance and these results have been applied to quantum measurement, signal detection, and other fields. [18][19][20][21][22] Furthermore, the tunable optical pulling forces on plasmonic nanostructures have been demonstrated at plasmon singularity and Fano resonance, and the giant pulling force was achieved due to the reversal of the electric field. [23,24] Fano resonance originating from the interference of simultaneously excited multipoles could also produce the pulling force on plasmonic nanoparticles.…”

Section: Introductionmentioning

confidence: 99%

Graphene-tuned threshold gain to achieve optical pulling force on microparticle*

Chen¹,

Huang²

2021

We investigate optical force on a graphene-coated gain microparticle by adopting the Maxwell’s stress tensor method. It is found that there exists a threshold gain in obtaining the Fano-profile optical force which indicates the reversal of optical pushing and pulling force. And giant pushing/pulling force can be achieved if the gain value of the material is in the proximity of the threshold gain. Our results show that the threshold gain is more sensitive to the relaxation time than to the Fermi energy of the graphene. We further study the optical force on larger microparticle to demonstrate the pulling force occurring at octupole resonance with small gain value and then it will appear at quadrupole resonance by increasing gain value. Our work provides an in-depth insight into the interaction between light and gain material and gives the additional degree of freedom to optical manipulation of microparticle.

Ideal optomechanically induced transparency generation in a cavity optoelectromechanical system*

Wang¹,

Tian²

2021

The ideal optomechanically induced transparency effects of an output probe field are investigated in a cavity optoelectromechanical system, which is composed of an optical cavity, a charged mechanical resonator, and a charged object. Although the charged mechanical resonator damping rate is nonzero, the ideal optomechanically induced transparency can still appear due to the non-rotating wave approximation effect in the system. The location of optomechanically induced transparency dip can be controlled via the Coulomb coupling strength. In addition, we find that both the transparency window width and the maximum dispersion curve slope are closely related to the optical cavity decay rate.