A control of threshold of hard excitaion mode of optomechanical system by a low-intensity seed wave

TL;DR

This paper demonstrates that a low-intensity seed wave can significantly lower the threshold for hard excitation modes in an optomechanical system, enabling more efficient control for optical transistors and logic devices.

Contribution

It introduces a method to control the excitation threshold in an optomechanical system using a seed wave, which was not previously explored.

Findings

Seed wave reduces the threshold of hard excitation mode

Switching occurs at lower pump intensities due to seed influence

Potential for creating all-optical transistors and logic elements

Abstract

An optomechanical system based on two optical modes, one of which is pumped by a coherent wave, interacting with each other via a phonon mode is considered. In such a system, a hard excitation mode can be realized in the region of bistability. It is demonstrated that excitation of an optical mode with a lower frequency by a low-intensity seed wave can lead to a significant reduction of a threshold of the hard excitation mode. This decrease is due to the fact that the seed wave changes the stability of solutions in the bistability region. This leads to the fact that switching from a non-generating state to a generating one occurs at lower values of the intensity of the pump wave. The obtained result paves the way for the creation of all-optical transistors and logical elements.