Barium oxide thin films designed as electro-optical gigahertz/terahertz filters

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dc.authorscopusidAtef Fayez Qasrawi / 6603962677
dc.authorwosidAtef Fayez Qasrawi / R-4409-2019
dc.contributor.authorAlharbi, Seham R.
dc.contributor.authorQasrawi, Atef Fayez
dc.contributor.authorGaabour, Laila H.
dc.date.accessioned2025-04-17T08:23:41Z
dc.date.available2025-04-17T08:23:41Z
dc.date.issued2025
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-optical system. The deposited films exhibited a polycrystalline tetragonal structure and are composed of a mixture of BaO and BaO2. The p-type films are highly transparent (80%) with an energy band gap of 3.55 eV containing exponential band tails of widths of 1.22 eV. Analyses using the Drude-Lorentz model demonstrated the films suitability for nonlinear optical applications, with optical conductivity parameters revealing a scattering time constant in the range of 0.4-1.8 fs, a free hole concentration of 1018-1019 cm-3 and drift mobility values of 0.70-3.16 cm2 Vs-1. Terahertz cutoff frequency spectra calculations indicated the films capability as efficient terahertz band filters with a cutoff frequency range of 3.2-193.0 THz. Additionally, the nonlinear third-order optical susceptibility increased with decreasing incident photon energy. 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 (approximate to 9 GHz) in the microwave frequency domain. These properties highlight the potential of BaO films as nonlinear optical filters and microwave waveguides, positioning them as candidates for gigahertz/terahertz technology applications.
dc.description.sponsorshipUniversity of Jeddah
dc.identifier.citationAlharbi, S. R., Qasrawi, A. F., & Gaabour, L. H. (2025). Barium Oxide Thin Films Designed as Electro‐Optical Gigahertz/Terahertz Filters. Crystal Research and Technology, 2400212.
dc.identifier.doi10.1002/crat.202400212
dc.identifier.issn0232-1300
dc.identifier.issn1521-4079
dc.identifier.scopus2-s2.0-85218681935
dc.identifier.scopusqualityQ3
dc.identifier.urihttp://dx.doi.org/10.1002/crat.202400212
dc.identifier.urihttps://hdl.handle.net/20.500.12713/6163
dc.identifier.wosWOS:001440158100001
dc.identifier.wosqualityQ3
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.institutionauthorQasrawi, Atef Fayez
dc.institutionauthoridAtef Fayez Qasrawi / 0000-0001-8193-6975
dc.language.isoen
dc.publisherJohn wiley and sons inc
dc.relation.ispartofCrystal research and technology
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.subjectBarium Oxide
dc.subjectDielectric
dc.subjectGigahertz
dc.subjectNonlinear Optics
dc.subjectTerahertz
dc.titleBarium oxide thin films designed as electro-optical gigahertz/terahertz filters
dc.typeArticle

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