OPTICAL TRANSIENT INDUCED ABSORPTION IN ULTRASMALL PARTICLES OF AMORPHOUS SELENIUM

Authors
YUMASHEV KV MIKHAILOV VP PROKOSHIN PV ARTEMYEV MV GURIN VS
Citation
Kv. Yumashev et al., OPTICAL TRANSIENT INDUCED ABSORPTION IN ULTRASMALL PARTICLES OF AMORPHOUS SELENIUM, Optics communications, 125(1-3), 1996, pp. 59-64
Citations number
31
Categorie Soggetti
Optics
Journal title
Optics communications → ACNP
ISSN journal
00304018
Volume
125
Issue
1-3
Year of publication
1996
Pages
59 - 64
Database
ISI
SICI code
0030-4018(1996)125:1-3<59:OTIAIU>2.0.ZU;2-S
Abstract
Nonlinear optical properties of ultrasmall particles of amorphous sele nium were studied by pump-probe picosecond technique. The effect of in duced absorption with maximum around 2.1 eV was observed. It relaxes c ompletely according to a monoexponential law with decay time similar t o 550 ps. Several possible mechanisms for this effect are considered a nd absorption due to trapped electron-hole pairs is proposed to be the main mechanism responsible for the transient induced absorption.