DYNAMICS OF ELECTRIC-FIELD SCREENING IN A BULK GAAS MODULATOR

被引：28

作者：

HEESEL, H

HUNSCHE, S

MIKKELSEN, H

DEKORSY, T

LEO, K

KURZ, H

机构：

[1] Institut für Halbleitertechnik II, Rheinisch-Westfälische Technische Hochschule Aachen, W-5100 Aachen

来源：

PHYSICAL REVIEW B | 1993年 / 47卷 / 23期

关键词：

D O I：

10.1103/PhysRevB.47.16000

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The transient development of electric-field distributions in a biased GaAs film after low density optical excitation is determined by measurements of Franz-Keldysh modulations with a time resolution of 100 fs. The experimental results are compared with theoretical calculations. The transient field is calculated with a drift-diffusion model. Our calculation of the dielectric function of GaAs includes the Coulomb coupling and the electric field. The resulting optical transmission changes are calculated with a transfer-matrix method. The theory predicts a modification of the Franz-Keldysh modulation due to the nonuniform field, in quantitative agreement with the experimental observations.

引用

页码：16000 / 16003

页数：4

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