FEMTOSECOND SPECTROSCOPIC STUDY OF ULTRAFAST CARRIER RELAXATION IN HYDROGENATED AMORPHOUS-SILICON A-SI-H

被引：26

作者：

ESSER, A

HEESEL, H

KURZ, H

WANG, C

PARSONS, GN

LUCOVSKY, G

机构：

[1] N CAROLINA STATE UNIV,DEPT MAT SCI & ENGN,RALEIGH,NC 27695

[2] N CAROLINA STATE UNIV,DEPT PHYS,RALEIGH,NC 27695

来源：

JOURNAL OF APPLIED PHYSICS | 1993年 / 73卷 / 03期

关键词：

D O I：

10.1063/1.353263

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We present a study of spectral- and time-resolved reflectivity and transmission measurements on hydrogenated amorphous silicon (a-Si:H) with 50 fs time resolution. Electron-hole pairs are photoexcited into the extended states of a-Si:H by an ultrashort pump pulse at homegaBAR=2 eV. The temporal evolution of the photoinduced optical response is studied for a broad range of excitation densities from 10(18) Up to 10(20) cm-3, and on a timescale of up to 200 ps. The temporal evolution of the optical response is discussed in terms of recombination and trapping mechanisms for carriers in the extended states of a-Si:H.

引用

页码：1235 / 1239

页数：5

共 13 条

[1] CHIRP MEASUREMENT OF LARGE-BANDWIDTH FEMTOSECOND OPTICAL PULSES USING 2-PHOTON ABSORPTION [J].