A Long-lived and Efficient Optomechanical Memory for Light

TL;DR

This paper presents a long-lived, efficient optomechanical memory for light using a low-dissipation mechanical resonator, achieving millisecond storage times and high efficiency at room temperature, with potential quantum applications.

Contribution

The work demonstrates a novel optomechanical memory with record-long storage times and high efficiency at room temperature, advancing quantum memory technology.

Findings

Storage time of approximately 23 ms at room temperature

Retrieval efficiency of about 40% for classical pulses

Potential for quantum light storage at cryogenic temperatures

Abstract

We demonstrate a memory for light based on optomechanically induced transparency. We achieve a long storage time by leveraging the ultra-low dissipation of a soft-clamped mechanical membrane resonator, which oscillates at MHz frequencies. At room temperature, we demonstrate a lifetime $T_1 \approx 23\,\mathrm{ms}$ and a retrieval efficiency $\eta \approx 40\%$ for classical coherent pulses. We anticipate storage of quantum light to be possible at moderate cryogenic conditions ($T\approx 10\,\mathrm{K}$). Such systems could find applications in emerging quantum networks, where they can serve as long-lived optical quantum memories by storing optical information in a phononic mode.