1 December 2017 Arsenic sulfide layers for dielectric reflection mirrors prepared from solution
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Proceedings Volume 10603, Photonics, Devices, and Systems VII; 106030M (2017) https://doi.org/10.1117/12.2292807
Event: Photonics Prague 2017, 2017, Prague, Czech Republic
Abstract
Chalcogenide materials due to high refractive indices, transparency in the mid-IR spectral region, nonlinear refractive indices, etc, have been employed as fibers and films in different photonic devices such as light amplifiers, optical regenerators, broadband radiation sources. Chalcogenide films can be prepared by physical methods as well as by solution-based techniques in which solutions of chalcogenides in amines are used. This paper presents results on the solution-based fabrication and optical characterization of single arsenic sulfide layers and multilayer stacks containing As2S3 layers together with porous silica layers coated on planar and fiber-optic substrates.
Input As2S3 solutions for the layer fabrications were prepared by dissolving As2S3 powder in n-propylamine in a concentration of 0.50 mol/l. These solutions were applied on glass slides by dip-coating method and obtained layers were thermally treated in vacuum at temperatures up to 180 °C. Similar procedure was used for As2S3 layers in multilayer stacks. Such stacks were fabricated by repeating the application of one porous silica layer prepared by the sol-gel method and one As2S3 layer onto glass slides or silica fibers (a diameter of 0.3 mm) by using the dip-coating method. It has been found that the curing process of the applied layers has to be carefully controlled in order to obtain stacks with three pairs of such layers.
Single arsenic and porous silica layers were characterized by optical microscopy, and by measuring their transmission spectra in a range of 200-2500 nm. Thicknesses and refractive indices were estimated from the spectra. Transmission spectra of planar multilayer stacks were measured, too. Interference bands have been determined from optical measurements on the multilayer stacks with a minimum transmittance of about 50% which indicates the possibility of using such stacks as reflecting mirrors.
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Vlastimil Matějec, Vlastimil Matějec, Jitka Pedlikova, Jitka Pedlikova, Ivo Bartoň, Ivo Bartoň, Ondřej Podrazký, Ondřej Podrazký, } "Arsenic sulfide layers for dielectric reflection mirrors prepared from solution", Proc. SPIE 10603, Photonics, Devices, and Systems VII, 106030M (1 December 2017); doi: 10.1117/12.2292807; https://doi.org/10.1117/12.2292807
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