Measurement of phase and amplitude modulations in Sb-based films

L. F. Avila; M. Nalin; Lucila Cescato

doi:10.1117/12.825143

20 August 2009 Measurement of phase and amplitude modulations in Sb-based films

L. F. Avila, M. Nalin, Lucila Cescato

Proceedings Volume 7404, Nanostructured Thin Films II; 74040W (2009) https://doi.org/10.1117/12.825143
Event: SPIE NanoScience + Engineering, 2009, San Diego, California, United States

Abstract

In this work we studied the changes of the optical constants of films in the binary system Sb₂O₃-Sb₂S₃ induced by light in the VIS-UV. The measurements were performed before and after homogeneous irradiation of the films to a Hg lamp and in real time during the holographic exposure of the samples (at 458nm). Changes of the absorption coefficient (amplitude grating) and refractive index (phase grating) were measured simultaneously using the self-diffraction using the holographic setup. Besides the films presented a strong photodarkening effect under homogeneous irradiation, the samples holographically exposed presented only refractive index modulations. None amplitude modulation was measured in real time for spatial frequencies of about 1000 l/mm.

Citation Download Citation

L. F. Avila, M. Nalin, and Lucila Cescato "Measurement of phase and amplitude modulations in Sb-based films", Proc. SPIE 7404, Nanostructured Thin Films II, 74040W (20 August 2009); https://doi.org/10.1117/12.825143

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