Laser-induced optical changes in amorphous multilayers
Materials Science
2009-11-13 v1
Abstract
It is shown that the well-known blue-shift of the fundamental absorption edge in as-deposited compositionally modulated amorphous Si/Ge and As6Se94/Se80Te20 multilayers (with periods of 4-8 nm) is further enhanced due to the thermal or laser-induced intermixing of adjacent layers. The laser-induced intermixing process, as supported by experiments and model calculations, can be attributed to both the local heating and photo-effects in As6Se94/Se80Te20 multilayers, while only the thermal effects were observed for Si/Ge multilayers. Structural transformations, based on this enhanced interdiffusion, provides good capability for spatially patterning optoelectronic devices and digital information recording.
Cite
@article{arxiv.0902.2044,
title = {Laser-induced optical changes in amorphous multilayers},
author = {M. Malyovanik and S. Ivan and A. Csik and G. A. Langer and D. L. Beke and S. Kokenyesi},
journal= {arXiv preprint arXiv:0902.2044},
year = {2009}
}