OPTICAL-CONSTANTS OF EPSILON-GASE

被引：24

作者：

ADACHI, S

SHINDO, Y

机构：

[1] Department of Electronic Engineering, Faculty of Engineering, Gunma University, Kiryu-shi

来源：

JOURNAL OF APPLIED PHYSICS | 1992年 / 71卷 / 01期

关键词：

D O I：

10.1063/1.351362

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The optical response of epsilon-GaSe for light polarization perpendicular to the c-axis in the 2.0-5.0-eV photon-energy range has been studied at room temperature by spectroscopic ellipsometry. The measured dielectric-function spectra reveal distinct structures at energies of the E1 (approximately 3.6 eV) and E3 (approximately 4.9 eV) critical points (CPs). The experimental data are analyzed on the basis of a simplified model of the interband transitions. The E1 structure is characterized by a two-dimensional (2D) M0 CP plus 2D discrete exciton, and the E3 structure is assumed to act as a damped harmonic oscillator. Results are in satisfactory agreement with the experiment over the entire range of photon energies.

引用

页码：428 / 431

页数：4

共 29 条

[1] EXCITONIC EFFECTS IN THE OPTICAL-SPECTRUM OF INP [J].