Photon-echo decay of naphthalene in durene and perdeutero-naphthalene

✍ Scribed by Thys J. Aartsma; Douwe A. Wiersma

• Publisher: Elsevier Science
• Year: 1978
• Tongue: English
• Weight: 423 KB
• Volume: 54
• Category: Article
• ISSN: 0009-2614
• DOI: 10.1016/0009-2614(78)85251-8

✦ Synopsis

Using two frequency-doubled, mtrogen laser pumped, dye-lasers we hJvvc measured the decay of the photon-echo in the lowest r&u -'Alg singlet state of naphthalene in durene and m perdeurero-naphthalene.

Optical phase relaxation in the durene m&ed crystal is believed to be caused by resonant phonon scattermg in the ground and cvzited state, and in the isotopically mixed crystal by scattering of the excited state into the nnglet -a&on band. At the lowest achievable tempe:atore (1.4 K), the photon-echo decay time (Tz) in both systems is still found to be much shorter than expected from the fluorescence decay times_ Energy transfer is held responsible for this dlscrepanclp.