Catalogo Articoli (Spogli Riviste)

OPAC HELP

Titolo:
Dynamics of photoinduced field screening; THz-pulse and second harmonic generation from semiconductor surface
Autore:
Malevich, VL;
Indirizzi:
Natl Acad Sci Republ Belarus, Div Opt Problems Informat Technol, Minsk 220141, Byelarus Natl Acad Sci Republ Belarus Minsk Byelarus 220141 insk 220141, Byelarus
Titolo Testata:
SURFACE SCIENCE
, volume: 454, anno: 2000,
pagine: 1074 - 1078
SICI:
0039-6028(20000520)454:<1074:DOPFST>2.0.ZU;2-A
Fonte:
ISI
Lingua:
ENG
Soggetto:
INDUCED 2ND-HARMONIC GENERATION; PLASMA-OSCILLATIONS; CARRIER TRANSPORT; GAAS;
Keywords:
models of non-equilibrium phenomena; photoconductivity; second harmonic generation; surface photovoltage spectroscopy;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
15
Recensione:
Indirizzi per estratti:
Indirizzo: Malevich, VL Natl Acad Sci Republ Belarus, Div Opt Problems Informat Technol, Kuprevitch St 1,Bldg 2, Minsk 220141, Byelarus Natl Acad Sci Republ Belarus Kuprevitch St 1,Bldg 2 Minsk Byelarus 220141
Citazione:
V.L. Malevich, "Dynamics of photoinduced field screening; THz-pulse and second harmonic generation from semiconductor surface", SURF SCI, 454, 2000, pp. 1074-1078

Abstract

The equation to describe the evolution of a space charge electric field ina semiconductor after an ultra-short laser pulse excitation is extended tobe valid for both drift-diffusion and collisionless transport regimes. Numerical calculations of this equation performed for a semiconductor surface depletion region show that the character of the surface electric field screening varies from monotonic to oscillatory with increasing photoexcitation level. It is found that THz-pulse emission from the excited surface depletion layer is determined by the second time derivative of the surface potential, and its waveform shows bipolar or oscillatory behaviour depending on whether drift-diffusion or collisionless transport regime is realized. The depletion field induced second harmonic (SH) contribution is analysed. (C) 2000 Elsevier Science B.V. All rights reserved.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 31/03/20 alle ore 10:01:09