LINEAR AND NONLINEAR-OPTICAL PROPERTIES OF STEPPED INXGA1-XAS GAAS QUANTUM-WELLS/

Authors
TOMASSINI N DANDREA A RIGHINI M SELCI S CALCAGNILE L CINGOLANI R SCHIUMARINI D SIMEONE MG
Citation
N. Tomassini et al., LINEAR AND NONLINEAR-OPTICAL PROPERTIES OF STEPPED INXGA1-XAS GAAS QUANTUM-WELLS/, Applied physics letters, 73(16), 1998, pp. 2245-2247
Citations number
18
Categorie Soggetti
Physics, Applied
Journal title
Applied physics letters → ACNP
ISSN journal
00036951
Volume
73
Issue
16
Year of publication
1998
Pages
2245 - 2247
Database
ISI
SICI code
0003-6951(1998)73:16<2245:LANPOS>2.0.ZU;2-W
Abstract
Systematic studies of polaritons in single stepped quantum wells are p erformed, and the presence of forbidden transitions in optical spectra are taken as a fingerprint of nonhomogeneous indium concentration. Th e large intensities of such transitions for well thicknesses in the ra nge of quasi-two-dimensional exciton behavior are pointed out. Finally , second harmonic generation excited at half gap is found to be enhanc ed with respect to the bulk contribution as suggested by the theory. ( C) 1998 American Institute of Physics. [S0003-6951(98)00842-0].