TIME-RESOLVED TEM OF LASER-INDUCED STRUCTURAL-CHANGES IN GETE FILMS

被引：7

作者：

BOSTANJOGLO, O

THOMSENSCHMIDT, P

机构：

[1] Optisches Institut der TU-Berlin, D-1000 Berlin 12

来源：

APPLIED SURFACE SCIENCE | 1990年 / 46卷 / 1-4期

关键词：

D O I：

10.1016/0169-4332(90)90177-2

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The multiple phase transformation of amorphous Ge0.8Te0.2 films, induced by a Q-switched, frequency-doubled Nd:YAG laser, is investigated by time-resolved TEM in two different modes: In the continuous mode the phase transformation is recorded by a photomultiplier/scintillator and a storage oscilloscope with a space/time resolution of 100 nm/3 ns. In the high-speed mode an image intensifier is attached to the microscope and double-frame images from intermediate states of the phase transition are recorded with exposure times ≥ 10 ns and variable delay times ≥ 50 ns. Additionally, the laser-induced "amorphization" of crystalline Ge0.15Te0.85 films is studied by both modes of time-resolved TEM. The "amorphization" proceeds during the laser pulse on the nanoseconds time scale. © 1990.

引用

页码：392 / 397

页数：6