Dynamical aspects of laser-induced phase transformations in amorphous GeTe

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.

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Dynamical aspects of laser-induced phase transformations in amorphous GeTe

Cited by 2 publications

References 7 publications

Analysis of writing and erasing behaviours in phase change materials

Analysis of writing and erasing behaviours in phase change materials

Dynamics of Rapid Phase Transformations in Amorphous GeTe Induced by Nanosecond Laser Pulses

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