Optical phonons of circular wires in porous GaP

被引：8

作者：

Belogorokhov, AI ^{[1
]}

Belogorokhova, LI

机构：

[1] State Res Inst Rare Met Ind, Moscow 109017, Russia

[2] Moscow MV Lomonosov State Univ, Moscow 119899, Russia

来源：

PHYSICS OF THE SOLID STATE | 2001年 / 43卷 / 09期

关键词：

D O I：

10.1134/1.1402237

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

The reflection spectra of porous gallium phosphide samples are investigated in the far infrared region of wave numbers (10-700 cm(-1)). In addition of the longitudinal and transverse optical phonon modes corresponding to the bulk material, additional vibrational modes are detected. Their number and spectral position are correctly described by a model of a dispersive dielectric medium under the assumption that porous gallium phosphide is formed by crystallites whose shape is close to cylindrical. It is concluded that such vibrational modes are optical phonons confined by the volume of the quantum wire. The experimental optical reflection spectra are used to obtain estimates of the average diameter of nanocrystallites forming the porous GaP layer. (C) 2001 MAIK "Nauka/Interperiodica".

引用

页码：1765 / 1769

页数：5

共 12 条

[1] TIME-RESOLVED BLUE AND ULTRAVIOLET PHOTOLUMINESCENCE IN POROUS GAP [J].