Nonlinear optical properties of amorphous semiconductors

Романова, Е. А.; Melnikov, A. V.; Kuzutkina, Yu.; Shiryaev, V.S.; Guizard, S.; Mouskeftaras, Alexandros

doi:10.1109/mmet.2012.6331217

Cited by 5 publications

(2 citation statements)

References 12 publications

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“…The carbonaceous cluster is one of the essential factors that influence the optical properties of polymer materials. For example, it is known that the following relation (Equation ( 2)) is a correlation between the carbon atoms number N per conjugation length and the band-gap, which can be calculated [28].…”

Section: Carbon Atoms Number Of B-co-mpmentioning

confidence: 99%

Effect of Gamma Irradiation on the Optical Properties of the Conjugated Copolymer B-co-MP

et al. 2022

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The conjugated polymer poly {[2-[2′,5′-bis(2″-ethylhexyloxy)phenyl]-1,4-phenylenevinylene]-co-[2-methoxy-5-(2′-ethylhexyloxy)-1,4-phenylenevinylene]} (B-co-MP) has been proven to be an excellent laser medium with a high photochemical stability. Moreover, the impact of γ-irradiation on its optical and chemical properties has been investigated. Herein, the spectral and amplified spontaneous emission (ASE) characteristics of B-co-MP at various concentrations under γ-irradiation doses are studied. Various concentrations of B-co-MP in tetrahydrofuran (THF) were prepared. The samples were irradiated with various γ-doses from 5 to 20 kGy using a Co-60 source at room temperature. The absorption, fluorescence, and ASE spectra were dramatically blue-shifted after the γ-irradiation. This indicates that the increment in the γ-irradiation dose led to a widening in the energy gap and reduction in the number of carbon atoms (N). The change in the spectral profiles could be attributed to chain conformational alterations and/or chain scission induced by the γ-irradiation. We anticipate this study to boost our understanding of optical and structural profiles of B-co-MP under various conditions, including γ-irradiation and the potential utility of this copolymer in a variety of applications.

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Section: Carbon Atoms Number Of B-co-mpmentioning

confidence: 99%

Effect of Gamma Irradiation on the Optical Properties of the Conjugated Copolymer B-co-MP

et al. 2022

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“…From the values of ω p one calculates ћω p which is the plasma energy of the valence electrons which one multiplies by Plack's constant ћ. Research published by Tichý affects the relations with mean energy deviation (E p ) or Penn deviation and Fermi energy (E F ) [66] with plasma energy of valence electrons from the following equations: [67,68] The values of ћω p , E p and E F that are calculated summarize an increase with the concentration of Ca. This behavior is opposite to that of the refractive index n l ( ) with Ca doping at higher wavelengths.…”

Section: Non-linear Optical Parametersmentioning

confidence: 99%

Enhancement of structural, linear and non-linear optical properties of Ti_1−xCa_2xO₂ solid solutions

Ezairi¹,

Elouafi²,

Lmai³

et al. 2022

Phys. Scr.

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Structural and morphological analyses of the Ti1-xCa2xO2 solid solutions and their complete linear and non-linear optical properties were investigated. Ti1-xCa2xO2 (0≤x≤0.5) powders were successfully synthesized via solid-state reaction route. The XRD patterns confirmed that the pure and doped samples exhibited anatase TiO2 phase. The crystallite size of TiO2 decreased to 82 nm after Ca doping. Furthermore, the dislocation density and lattice deformation are increased with increasing calcium concentration. SEM analysis revealed that Ti1-xCa2xO2 (0≤x≤0.5) powders have a granular structure and with doping, atom aggregations take on softer shapes. Energy dispersive x-ray Analysis (EDX) showed the appropriate composition for the ions depicted in the structure. Using spectrophotometric data, linear and nonlinear optical parameters were obtained and associated with the Ca content. The band gap of TiO2 has shifted from 3.1 to 2.8 eV with dopant concentration. As the percentage of Ca increased, the dielectric constant and optical conductivity also increased. The dispersion energy, plasma frequency, non-linear refractive index and Sellmeier’s parameters were also calculated and discussed with respect to Ca doping. The optical results obtained revealed the potential of the

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Heterostructured Nanocomposites of Ag Doped Fe3O4 Embedded in ZnO for Antibacterial Applications and Catalytic Conversion of Hazardous Wastes

Babu

Sebastian

Manaf

et al. 2019

J Inorg Organomet Polym

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Nonlinear optical properties of amorphous semiconductors

Abstract: Theoretical and experimental approaches to study dispersion of the nonlinear coefficients of refraction and absorption in amorphous semiconductors are overviewed. Nonlinear properties of the chalcogenide glasses over a wide spectral range are studied in various models and discussed.

Cited by 5 publications

References 12 publications

Effect of Gamma Irradiation on the Optical Properties of the Conjugated Copolymer B-co-MP

Effect of Gamma Irradiation on the Optical Properties of the Conjugated Copolymer B-co-MP

Enhancement of structural, linear and non-linear optical properties of Ti_1−xCa_2xO₂ solid solutions

Heterostructured Nanocomposites of Ag Doped Fe3O4 Embedded in ZnO for Antibacterial Applications and Catalytic Conversion of Hazardous Wastes

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Nonlinear optical properties of amorphous semiconductors

Abstract: Theoretical and experimental approaches to study dispersion of the nonlinear coefficients of refraction and absorption in amorphous semiconductors are overviewed. Nonlinear properties of the chalcogenide glasses over a wide spectral range are studied in various models and discussed.

Cited by 5 publications

References 12 publications

Effect of Gamma Irradiation on the Optical Properties of the Conjugated Copolymer B-co-MP

Effect of Gamma Irradiation on the Optical Properties of the Conjugated Copolymer B-co-MP

Enhancement of structural, linear and non-linear optical properties of Ti1−xCa2xO2 solid solutions

Heterostructured Nanocomposites of Ag Doped Fe3O4 Embedded in ZnO for Antibacterial Applications and Catalytic Conversion of Hazardous Wastes

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About

Enhancement of structural, linear and non-linear optical properties of Ti_1−xCa_2xO₂ solid solutions