Barium Oxide Thin Films Designed as Electro-OpticalGigahertz/Terahertz Filters

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dc.authorid0000-0001-8193-6975
dc.authorscopusid6603962677
dc.authorwosidR-4409-2019
dc.contributor.authorQAsrawi Atef Fayez
dc.contributor.authorAlharbi Seham
dc.contributor.authorLaila H. Gaabour
dc.date.accessioned2025-04-18T10:38:54Z
dc.date.available2025-04-18T10:38:54Z
dc.date.issued23.02.2025
dc.departmentİstinye Üniversitesi, Mühendislik ve Doğa Bilimleri Fakültesi, Elektrik-Elektronik Mühendisliği Bölümü
dc.description.abstractHerein barium oxide thin films are studied as a promising electro-opticalsystem. The deposited films exhibited a polycrystalline tetragonalstructure and are composed of a mixture of BaO and BaO2 . The p-type filmsare highly transparent (80%) with an energy band gap of 3.55 eV containingexponential band tails of widths of 1.22 eV. Analyses using the Drude-Lorentzmodel demonstrated the films suitability for nonlinear optical applications,with optical conductivity parameters revealing a scattering time constantin the range of 0.4–1.8 fs, a free hole concentration of 10 18−10 19 cm−3 anddrift mobility values of 0.70–3.16 cm 2 Vs−1 . Terahertz cutoff frequency spectra calculations indicated the films capability as efficient terahertz band filterswith a cutoff frequency range of 3.2–193.0 THz. Additionally, the nonlinear third-order optical susceptibility increased with decreasing incident photonenergy. Applying an AC signal with a driving frequency of 0.01–1.40 GHz across the terminals of Yb/BaO/Ag devices revealed a high cutoff frequency (≈9 GHz)in the microwave frequency domain. These properties highlight the potential ofBaO films as nonlinear optical filters and microwave waveguides, positioningthem as candidates for gigahertz/terahertz technology applications
dc.identifier.endpage9
dc.identifier.issue2400212
dc.identifier.startpage1
dc.identifier.urihttps://hdl.handle.net/20.500.12713/7160
dc.institutionauthorQasrawi , Atef Fayez
dc.institutionauthorid0000-0001-8193-6975
dc.language.isoen
dc.publisherCrystal Research and Technology, Wiley
dc.relation.ispartofCrystal Research and Technology,
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/embargoedAccess
dc.subjectbarium oxide
dc.subjectdielectric
dc.subjectgigahertz
dc.subjectnonlinear optics
dc.subjectterahertz
dc.titleBarium Oxide Thin Films Designed as Electro-OpticalGigahertz/Terahertz Filters
dc.typeArticle

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