Optical properties of chromium-selenide films designed for terahertz applications

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dc.authoridAtef Fayez Qasrawi / 0000-0001-8193-6975en_US
dc.authorscopusidAtef Fayez Qasrawi / 6603962677en_US
dc.authorwosidAtef Fayez Qasrawi / R-4409-2019en_US
dc.contributor.authorAljaloud, Amjad Salamah M.
dc.contributor.authorQasrawi, Atef Fayez
dc.contributor.authorAlfhaid, Latifah Hamad Khalid
dc.date.accessioned2024-02-22T07:35:55Z
dc.date.available2024-02-22T07:35:55Z
dc.date.issuedEylul 2023en_US
dc.departmentİstinye Üniversitesi, Mühendislik ve Doğa Bilimleri Fakültesi, Elektrik-Elektronik Mühendisliği Bölümüen_US
dc.description.abstractHerein the effects of indium substrates on the properties of chromium selenide thin films are reported. Chromium selenide thin films and indium substrates are prepared by the thermal evaporation technique under a vacuum pressure of 10?5 mbar. It is observed that indium sublayers alters the atomic stoichiometry of chromium selenide. It induces the formation of Cr2Se3 phase instead of CrSe2 phase which grow onto glass substrates. Both of the glass/CrSe2 and In/Cr2Se3 films displayed direct and indirect energy band gaps. The respective gaps are 2.60 eV and 3.19 eV and 2.25 eV and 2.83 eV. The Urbach tails states exhibited a width of 2.24 eV in glass/CrSe2 and showed value of 0.85 eV in In/Cr2Se3. In addition a light absorbability enhancement of more than 45% is reached at the In/Cr2Se3 interfaces in the visible range of light. Moreover, as terahertz resonators, In/Cr2Se3 films showed larger optical conductivity. It also displayed a spectral terahertz cutoff frequency in the range of 3.0–35 THz. Furthermore, when utilized as terahertz resonators, In/Cr2Se3 films demonstrate heightened optical conductivity and a spectral terahertz cutoff frequency ranging from 3.0 to 35 THz. Analyzing these terahertz oscillators using Drude-Lorentz models reveals that the density of free charge carriers increases with higher oscillator energy, while the drift mobility of these carriers within the terahertz resonators varies between 1.10 and 3.09 cm²/Vs. The array of features showcased by In/Cr2Se3 thin films, including their performance as terahertz resonators, positions them as strong contenders for applications in optical and terahertz technologies.en_US
dc.description.sponsorshipThis research has been funded by Scientific Research Deanship at University of Ha’il Saudi Arabia through project number BA-22028.en_US
dc.identifier.citationAljaloud, A. S. M., Qasrawi, A. F., & Alfhaid, L. H. K. (2023). Optical properties of chromium-selenide films designed for terahertz applications. Optik, 292, 171395.en_US
dc.identifier.doi10.1016/j.ijleo.2023.171395en_US
dc.identifier.issn0030-4026en_US
dc.identifier.scopus2-s2.0-85172029044en_US
dc.identifier.scopusqualityQ2en_US
dc.identifier.urihttps://doi.org/10.1016/j.ijleo.2023.171395
dc.identifier.urihttps://hdl.handle.net/20.500.12713/3985
dc.identifier.volume292en_US
dc.indekslendigikaynakScopusen_US
dc.institutionauthorQasrawi, Atef Fayez
dc.language.isoenen_US
dc.publisherOptiken_US
dc.relation.ispartofElsevieren_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.subject6G Technologyen_US
dc.subjectDrude-Lorentzen_US
dc.subjectIn/Cr2Se3en_US
dc.subjectOpticalen_US
dc.subjectTerahertz Resonatorsen_US
dc.titleOptical properties of chromium-selenide films designed for terahertz applicationsen_US
dc.typeArticleen_US

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