Optical Constants of rare-Earth Substituted Ferrite-Type Amorphous Garnets and Nanoscale Garnet-Oxide Layers

Mohammad Nur-E-Alam; Mikhail Vasiliev; Kamal Alameh

doi:10.20944/preprints201902.0250.v1

Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

Version 1 : Received: 26 February 2019 / Approved: 27 February 2019 / Online: 27 February 2019 (09:09:58 CET)

Amorphous ferrite-type rare-earth (RE) substituted garnets and garnet-oxide nanocomposite layers are prepared on clear glass substrates by using RF magnetron sputter-deposition process. By using a combination approach employing custom-built spectrum-fitting software in conjunction with Swanepoel’s envelope method, the spectral dispersion function of optical constants and the layer thicknesses are derived accurately from the transmission spectra of the as-deposited samples. The effects of excess metal-oxides added to the base material systems during the co-deposition process are found to affect the refractive index and the optical absorption coefficients of garnet-oxide composites. A number of optical constant datasets are presented, enabling the experimentalists to design nanophotonic or integrated-optics devices employing these functional materials.

rare-earth garnets; optical constants; envelope method; nano-composites; magneto-optics

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Optical Constants of rare-Earth Substituted Ferrite-Type Amorphous Garnets and Nanoscale Garnet-Oxide Layers

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