Open AccessTunable slow and fast light in parity-time-symmetric optomechanical systems with phonon pump
Author(s) -
Cheng Jiang,
Cui Yuan-shun,
Zhangyin Zhai,
Hang Yu,
Xiaowei Li,
Guibin Chen
Publication year - 2018
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.26.028834
Subject(s) - amplitude , slow light , phonon , physics , optics , parity (physics) , coherent control , dispersion (optics) , phase (matter) , light field , phase control , optoelectronics , laser , atomic physics , condensed matter physics , quantum mechanics , photonic crystal
We study the response of parity-time (PT)-symmetric optomechanical systems with tunable gain and loss to the weak probe field in the presence of a strong control field and a coherent phonon pump. We show that the probe transmission can exceed unity at low control power due to the optical gain of the cavity and it can be further enhanced or suppressed by tuning the amplitude and phase of the phonon pump. Furthermore, the phase dispersion of the transmitted probe field is modified by controlling the applied fields, which allows one to tune the group delay of the probe field. Based on this optomechianical system, we can realize a tunable switch between slow and fast light effect by adjusting the gain-to-loss ratio, power of the control field as well as the amplitude and phase of the phonon pump. Our work provides a platform to control the light propagation in a more flexible way.