Amorphous WO3 thin films designed as gigahertz/terahertz dielectric lenses

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dc.authoridAtef Fayez Qasrawi / 0000-0001-8193-6975en_US
dc.authorscopusidAtef Fayez Qasrawi / 6603962677
dc.authorwosidAtef Fayez Qasrawi / R-4409-2019
dc.contributor.authorQasrawi, Atef Fayez
dc.contributor.authorAbu Alrub, Shatha N.
dc.contributor.authorDaragme, Rana B.
dc.date.accessioned2022-06-22T07:33:01Z
dc.date.available2022-06-22T07:33:01Z
dc.date.issued2022en_US
dc.departmentİstinye Üniversitesi, Mühendislik ve Doğa Bilimleri Fakültesi, Elektrik-Elektronik Bölümüen_US
dc.description.abstractHerein, tungsten oxide thin films comprising excess oxygen are treated as optical resonator suitable for gigahertz/terahertz applications. WO3 thin films which are prepared by the thermal evaporation technique under a vacuum pressure of 10? 5 mbar are structurally, compositionally and optically evaluated. The amorphous WO3 films which showed high transparency permit electronic transitions within an indirect allowed energy band gap of 3.05 eV. The band gap comprised energy band tails of width of 190 meV. Four dominant dielectric resonators centered in the infrared (IR), visible (VIS) and ultraviolet (UV) ranges of light are detected. Analysis of the optical conductivity in accordance with the Drude-Lorentz approaches have shown that the drift mobility of free holes in this amorphous layer can be as large as 5.61 cm2/Vs an as low as 1.59 cm2/Vs when exposed to IR and UV light signals, respectively. In addition, the gigahertz/terahertz cutoff frequency (fco) spectra demonstrated fco values in the gigahertz frequency domain when exposed to IR light. Excitations with light signals in the VIS and UV spectral ranges allow fco values that extends from 0.7 to 40.0 THz. The wide range of tunability of the WO3 dielectric resonators nominates them as dielectric lenses suitable for optical communications.en_US
dc.identifier.citationQasrawi, A. F., Abu Alrub, S. N., Daragme, R. B. (2022). Amorphous WO3 thin films designed as gigahertz/terahertz dielectric lenses. Optical and Quantum Electronics, 54, 449.en_US
dc.identifier.doi10.1007/s11082-022-03708-6en_US
dc.identifier.scopus2-s2.0-85132332718en_US
dc.identifier.scopusqualityN/Aen_US
dc.identifier.startpage449en_US
dc.identifier.urihttps://doi.org/10.1007/s11082-022-03708-6
dc.identifier.urihttps://hdl.handle.net/20.500.12713/2928
dc.identifier.volume54en_US
dc.identifier.wosWOS:000926091700001en_US
dc.identifier.wosqualityQ2en_US
dc.indekslendigikaynakWeb of Scienceen_US
dc.indekslendigikaynakScopusen_US
dc.institutionauthorQasrawi, Atef Fayez
dc.language.isoenen_US
dc.publisherSpringer Linken_US
dc.relation.ispartofOptical and Quantum Electronicsen_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.subjectWO3en_US
dc.subjectOptical Communicationsen_US
dc.subjectTerahertzen_US
dc.subjectDielectric Resonatoren_US
dc.titleAmorphous WO3 thin films designed as gigahertz/terahertz dielectric lensesen_US
dc.typeArticleen_US

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