DYNAMICS OF RAPID PHASE-TRANSFORMATIONS IN AMORPHOUS GETE INDUCED BY NANOSECOND LASER-PULSES

被引：11

作者：

NAKAYOSHI, Y ^{[1
]}

KANEMITSU, Y ^{[1
]}

MASUMOTO, Y ^{[1
]}

MAEDA, Y ^{[1
]}

机构：

[1] HITACHI LTD,HITACHI RES LAB,HITACHI,IBARAKI 31912,JAPAN

来源：

JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS SHORT NOTES & REVIEW PAPERS | 1992年 / 31卷 / 2B期

关键词：

AMORPHOUS GETE; LASER-INDUCED PHASE TRANSFORMATION; SUPERCOOLED LIQUID; TIME-RESOLVED SPECTROSCOPY;

D O I：

10.1143/JJAP.31.471

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We have studied laser-induced rapid transformations of GeTe from an amorphous phase to a crystalline phase by means of nanosecond time-resolved optical reflectivity and transmission measurements. Two different processes for crystallization were observed. One of the crystallization processes is that inhomogeneous melting occurs in a laser-heated volume and large grains of crystalline GeTe are formed in the amorphous matrix. The other crystallization occurs at laser fluences well above the melting threshold. The phase transformation from the amorphous to the crystalline phases via a homogeneous liquid phase is triggered by the bulk nucleation in a highly supercooled liquid.

引用

页码：471 / 475

页数：5

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