Temperature enhanced photothermal cooling of a micro-cantilever

TL;DR

This paper demonstrates that lowering the temperature from 298 K to 100 K significantly enhances photothermal cooling efficiency in a micro-cantilever FP cavity, due to temperature-dependent backaction dynamics, enabling more effective cooling.

Contribution

It introduces a temperature-controlled photothermal cooling scheme and provides experimental and numerical evidence of improved cooling efficiency at lower temperatures.

Findings

Cooling efficiency improves by approximately tenfold when temperature decreases from 298 K to 100 K.

Photothermal backaction dynamics are strongly temperature-dependent.

Optimizing temperature can significantly enhance micro-cantilever cooling performance.

Abstract

We present a temperature enhanced photothermal cooling scheme in a micro-cantilever based FP cavity. Experiments at various temperatures show a temperature dependence of photothermal cooling efficiency. And approximate one order of improvement on the cooling efficiency is achieved experimentally when the temperature decreases from 298 K to 100 K. Numerical analysis reveals that the dramatic change of the cooling efficiency is attributed to the temperature dependent dynamics of the photothermal backaction. A high efficient cooling can be achieved by controlling the temperature for an optimized the dynamics of photothermal backaction.