Molecular Piston Engine with Spiking Transduction of Back-action in Hybrid Opto-mechanical Brownian Motors

TL;DR

This paper explores a hybrid opto-mechanical system that models a molecular piston engine, analyzing back-action transduction, eigenmodes, and thermodynamic behavior in strong and weak coupling regimes, with implications for Brownian motors.

Contribution

It introduces a novel molecular opto-mechanical model with back-action transduction and analyzes its eigenmodes, coupling regimes, and thermodynamic properties for Brownian motor applications.

Findings

Eigenfunction spectrum shows normal mode splitting.

Back-action transduction enables photon-to-mechanical mode conversion.

Phonon lasing demonstrates thermodynamic work in the system.

Abstract

We consider the Molecular Opto-mechanical systems in back-action amplification of single molecule Raman imaging. Surface Enhanced Raman Scattering (SERS) is mapped into the dissipative cavity opto-mechanics system of coupled resonators. We investigate the plasmon molecular vibration interactions in strong coupling regimes of cavity opto-mechanics in the presence of impurities. Eigenfunction spectrum is analyzed for the normal mode splitting of photonic and mechanical hybrid system. Back-action transduction of photons into mechanical modes is investigated by avoided crossing due to the nonlinear interactions and Casimir forces in the presence of virtual photons and radiation pressure. In input-output coupled cavity scheme, both cavity and driving fields are analyzed for the absorption and dissipation of heat in weak and strong coupling regimes of the cascaded cavity setup. In terms of the second order coherence functions, thermodynamic work and heat engine are investigated via phonon lasing of mechanical mode in opto-mechanical implementation of Brownian motors by tuning the competing coupling strengths of impurities and nonlinearities.