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Proceedings Paper

Yttrium hydride films as switchable mirrors: optical characterization and electronic structure
Author(s): M. M. Sanchez-Lopez; P. Velasquez; R. Castaner; A. Gutierrez; J. Costa-Quintana; F. Lopez-Aguilar
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Paper Abstract

The development of switchable mirrors based on yttrium hydride thin films is shown. Yttrium is deposited on regular glass under ultra-high vacuum conditions. Upon hydrogen pressure the transition from light-reflecting metal YH2 to transparent insulating YH3 is induced. Surface and optical characterization is performed to improve the deposition and hydrogenation conditions. A good variable transparency is achieved, with transmittance up to 70% in the visible range for the completely hydrogenated sample. The electronic structure of the YH3 phase is calculated by considering strong correlation corrections to the crystal potential. We obtain a gap in the quasiparticle spectrum that agrees with the optical transmittance of the YH3 phase. A prototype device based on these films is proposed.

Paper Details

Date Published: 19 November 2003
PDF: 2 pages
Proc. SPIE 4829, 19th Congress of the International Commission for Optics: Optics for the Quality of Life, (19 November 2003); doi: 10.1117/12.531209
Show Author Affiliations
M. M. Sanchez-Lopez, Univ. Miguel Hernandez de Elche (Spain)
P. Velasquez, Univ. Miguel Hernandez de Elche (Spain)
R. Castaner, Univ. Miguel Hernandez de Elche (Spain)
A. Gutierrez, Univ. Autonoma de Madrid (Spain)
J. Costa-Quintana, Univ. Autonoma de Madrid (Spain)
F. Lopez-Aguilar, Univ. Autonoma de Barcelona (Spain)

Published in SPIE Proceedings Vol. 4829:
19th Congress of the International Commission for Optics: Optics for the Quality of Life
Giancarlo C. Righini; Anna Consortini, Editor(s)

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