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Analysis of sub-bandgap losses in TiO2 coating deposited via single and dual ion beam deposition
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SYSNO ASEP 0475292 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Analysis of sub-bandgap losses in TiO2 coating deposited via single and dual ion beam deposition Tvůrce(i) Žídek, Karel (UFP-V) ORCID
Hlubuček, Jiří (UFP-V)
Horodyská, Petra (UFP-V)
Budasz, Jiří (UFP-V)
Václavík, Jan (UFP-V) RIDZdroj.dok. Thin Solid Films. - : Elsevier - ISSN 0040-6090
Roč. 626, March (2017), s. 60-65Poč.str. 6 s. Forma vydání Tištěná - P Jazyk dok. eng - angličtina Země vyd. CH - Švýcarsko Klíč. slova Ion beam deposition ; Titanium dioxide ; Optical coating ; Sub-bandgap losses ; Urbach tail Vědní obor RIV BH - Optika, masery a lasery Obor OECD Optics (including laser optics and quantum optics) CEP LO1206 GA MŠMT - Ministerstvo školství, mládeže a tělovýchovy Institucionální podpora UFP-V - RVO:61389021 UT WOS 000398646100008 EID SCOPUS 85013040666 DOI 10.1016/j.tsf.2017.02.036 Anotace We present a detailed study of sub-bandgap losses in TiO2 optical coatings prepared by using a single and a dual ion beam deposition. By extracting high-precision spectra of the losses in the TiO2 layers deposited under varied parameters we were able to study the losses in great detail. We were able to identify several spectral features and discuss their origin. Additional experiments allowed us to determine the contribution of absorption and scattering to the losses, as well as to discern whether the observed losses have volume or interface character. The results reveal that the dominant source of absorption in the high-quality samples is volume absorption originating from the so-called Urbach tail. We discuss the limitations imposed by the Urbach tail. Pracoviště Ústav fyziky plazmatu Kontakt Vladimíra Kebza, kebza@ipp.cas.cz, Tel.: 266 052 975 Rok sběru 2018
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