3-PHOTON-EXCITATION SPECTROSCOPY FOR THE EXCITON RELAXATION IN ALKALI-HALIDES

Authors
Citation
K. Tanimura, 3-PHOTON-EXCITATION SPECTROSCOPY FOR THE EXCITON RELAXATION IN ALKALI-HALIDES, Journal of the Physical Society of Japan, 65(11), 1996, pp. 3672-3675
Citations number
31
Categorie Soggetti
Physics
ISSN journal
00319015
Volume
65
Issue
11
Year of publication
1996
Pages
3672 - 3675
Database
ISI
SICI code
0031-9015(1996)65:11<3672:3SFTER>2.0.ZU;2-P
Abstract
The yields of sigma and pi luminescence due to self-trapped excitons h ave been measured upon the three-photon excitation (TPE) which gives r ise to the resonance on the upper branch of the lowest exciton-polarit on in NaCl and KI. Both the sigma and pi luminescence are induced by t he TPE in the whole wavelength range of the resonance, and the yield o f the sigma luminescence relative to that of the pi luminescence is as high as that by the conventional band-to-band excitation, showing str ong contrast to the result of the one-photon excitation (OPE) spectros copy. The different feature of the sigma-luminescence excitation in TP E from that in OPE has been discussed.