Spectral hole burning for stopping light

TL;DR

This paper introduces a new protocol for storing and retrieving photon wave packets in solid-state atomic media using spectral hole burning, enabling efficient light storage without a coupling beam.

Contribution

It presents a novel spectral hole burning-based protocol for photon storage in solid-state systems, distinct from electromagnetically induced transparency methods.

Findings

Group velocity reduction proportional to hole width

High theoretical recovery efficiency

No need for a coupling beam

Abstract

We propose a novel protocol for storage and retrieval of photon wave packets in a $\Lambda$-type atomic medium. This protocol derives from spectral hole burning and takes advantages of the specific properties of solid state systems at low temperature, such as rare earth ion doped crystals. The signal pulse is tuned to the center of the hole that has been burnt previously within the inhomogeneously broadened absorption band. The group velocity is strongly reduced, being proportional to the hole width. This way the optically carried information and energy is carried over to the off-resonance optical dipoles. Storage and retrieval are performed by conversion to and from ground state Raman coherence by using brief $\pi$-pulses. The protocol exhibits some resemblance with the well known electromagnetically induced transparency process. It also presents distinctive features such as the absence of coupling beam. In this paper we detail the various steps of the protocol, summarize the critical parameters and theoretically examine the recovery efficiency.