Answers are grounded in this paper and cite their sources.
Highly efficient two-pulse and stimulated photon echoes are experimentally demonstrated in an absorbing medium. Recall efficiencies of 235% and 150% with excellent signal contrast are measured for two-pulse and stimulated photon echoes, respectively, in a Tm:YAG crystal with an absorption length of 3.8. The reported efficiencies do not include any correction for decay or beam profile. We believe that this is the first demonstration of an uncorrected echo efficiency greater than 100% with good signal fidelity in an optically thick medium.
No takes yet. Share an insight, caveat, or question.
Cornish et al. (2000) studied this question.
Synapse has enriched 10 related papers. Consider them for comparative context: