Regular Article

Multi-channel optomechanically induced amplification in a parity-time-symmetric Laguerre-Gaussian rovibrational-cavity system

¹ Hubei Engineering Technology Research Center of Energy Photoelectric Device and System, School of Science, Hubei University of Technology, Wuhan, 430068 Hubei, P.R. China
² Key Laboratory of Quantum Information, Chinese Academy of Sciences, University of Science and Technology of China Hefei, Anhui 230026, P.R. China
³ College of Physics and Electronic Science, Hubei Normal University Huangshi, Hubei 435002, P.R. China

^a e-mail: roseblue279@sina.com

Received: 18 June 2020
Received in final form: 27 September 2020
Accepted: 30 September 2020
Published online: 1 December 2020

Abstract

This paper studies the response of a parity-time-symmetric Laguerre-Gaussian-cavity optomechanical system to a weak probe field, where an active cavity is coupled to a Laguerre-Gaussian rovibrational-cavity system. It is shown that three-amplification-peak profile emerges for the probe transmission. The transmission rate can be adjusted by controlling the coupling coefficient, the pump amplitude and the topological charge. Besides, we find that the light transmission group delay can be altered between positive and negative value by adjusting the coupling coefficient and the topological charge. This study can be applied to light propagation manipulation and quantum precision measurement.