ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS |
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One-dimensional structure made of periodic slabs of SiO2/InSb offering tunable wide band gap at terahertz frequency range |
Sepehr Razi1, Fatemeh Ghasemi2 |
1 Faculty of Electrical Engineering, Urmia University of Technology(UUT), Urmia, Iran; 2 Department of Energy Engineering and Physics, Amirkabir University of Technology, PO Box 15875-4413, Tehran, Iran |
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Abstract Optical features of a semiconductor-dielectric photonic crystal are studied theoretically. Alternating layers of micrometer sized SiO2/InSb slabs are considered as building blocks of the proposed ideal crystal. By inserting additional layers and disrupting the regularity, two more defective crystals are also proposed. Photonic band structure of the ideal crystal and its dependence on the structural parameters are explored at the first step. Transmittance of the defective crystals and its changes with the thicknesses of the layers are studied. After extracting the optimum values for the thicknesses of the unit cells of the crystals, the optical response of the proposed structures at different temperatures and incident angles are investigated. Changes of the defect layers' induced mode(s) are discussed by taking into consideration of the temperature dependence of the InSb layer permittivity. The results clearly reflect the high potential of the proposed crystals to be used at high temperature terahertz technology as a promising alternative to their electronic counterparts.
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Received: 17 May 2019
Revised: 04 September 2019
Accepted manuscript online:
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PACS:
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42.70.Qs
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(Photonic bandgap materials)
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78.67.Pt
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(Multilayers; superlattices; photonic structures; metamaterials)
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Corresponding Authors:
Sepehr Razi
E-mail: s.razi@uut.ac.ir
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Cite this article:
Sepehr Razi, Fatemeh Ghasemi One-dimensional structure made of periodic slabs of SiO2/InSb offering tunable wide band gap at terahertz frequency range 2019 Chin. Phys. B 28 124205
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