Observations of time delayed all-optical routing in a slow light regime

TL;DR

This paper reports the observation of time-delayed all-optical routing using ultraslow light in a solid medium, demonstrating coherence conversion from spin to photon states via four-wave mixing.

Contribution

It presents the first direct retrieval of resonant Raman-pulse excited spin coherence into photon coherence through coherence conversion in a slow light regime.

Findings

Demonstrated delayed all-optical routing in a slow light medium

Achieved coherence conversion from spin to photon states

Observed ultraslow group velocity of light in a solid medium

Abstract

We report an observation of a delayed all-optical routing/switching phenomenon based on ultraslow group velocity of light via nondegenerate four-wave mixing processes in a defected solid medium. Unlike previous demonstrations of enhanced four-wave mixing processes using the slow light effects, the present observation demonstrates a direct retrieval of the resonant Raman-pulse excited spin coherence into photon coherence through coherence conversion processes.