Interference of birefractive waves in CdGa2S4 crystals(

Syrbu Nicolae; Tiron Andrew; Parvan Vladimir; Zalamai Victor; Tiginyanu Ion

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SYRBU, Nicolae, TIRON, Andrew, PARVAN, Vladimir, ZALAMAI, Victor, TIGINYANU, Ion. Interference of birefractive waves in CdGa2S4 crystals(. In: Physica B: Condensed Matter, 2015, vol. 463, pp. 88-92. ISSN -. DOI: https://doi.org/10.1016/j.physb.2015.02.007

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Physica B: Condensed Matter

Volumul 463 / 2015 / ISSN - /ISSNe 0921-4526

Interference of birefractive waves in CdGa₂S₄ crystals(

DOI:https://doi.org/10.1016/j.physb.2015.02.007

Pag. 88-92

Syrbu Nicolae¹, Tiron Andrew¹, Parvan Vladimir¹, Zalamai Victor², Tiginyanu Ion³

¹ Technical University of Moldova,
² Institute of Applied Physics, Academy of Sciences of Moldova,
³ Institute of the Electronic Engineering and Nanotechnologies "D. Ghitu" of the Academy of Sciences of Moldova

Disponibil în IBN: 20 decembrie 2017

Rezumat

In CdGa₂S₄ crystals the Fabry-Perot and birefringence interference spectra were investigated. Spectral dependences of refraction indexes for ordinary (n_o) and extraordinary (n_e) light waves are defined. The spectral dependence Δn=n_e-n_o from the short and long-wavelength parts of isotropic wavelength λ₀=485.7 nm (300 K) is determined. It is established that at λ>λ₀ Δn is positive and at λ<λ₀ Δn is negative. Wavelength λ₀=485.7 nm shifts with decreasing temperature to short-wavelengths. The phase difference of ordinary and extraordinary light waves for λ>λ₀ and λ<λ₀ was determined. The band in reflection spectra observed at the isotropic wavelength has a small halfwidth (3-5 Å). Another isotropic wavelength was found in the short-wavelength region (433 nm) for crystals obtained by iodine transport method.

Cuvinte-cheie
Birefringence, Cadmium thiogallate, Interference spectra, Isotropic wavelength,

Ordinary and extraordinary waves

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<title xml:lang='en'>Interference of birefractive waves in CdGa2S4 crystals(</title>
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<publicationYear>2015</publicationYear>
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<subject>Birefringence</subject>
<subject>Cadmium thiogallate</subject>
<subject>Interference spectra</subject>
<subject>Isotropic wavelength</subject>
<subject>Ordinary and extraordinary waves</subject>
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<description xml:lang='en' descriptionType='Abstract'><p>In CdGa<sub>2</sub>S<sub>4</sub> crystals the Fabry-Perot and birefringence interference spectra were investigated. Spectral dependences of refraction indexes for ordinary (n<sub>o</sub>) and extraordinary (n<sub>e</sub>) light waves are defined. The spectral dependence &Delta;n=n<sub>e</sub>-n<sub>o</sub> from the short and long-wavelength parts of isotropic wavelength &lambda;<sub>0</sub>=485.7 nm (300 K) is determined. It is established that at &lambda;&gt;&lambda;<sub>0</sub> &Delta;n is positive and at &lambda;&lt;&lambda;<sub>0</sub> &Delta;n is negative. Wavelength &lambda;<sub>0</sub>=485.7 nm shifts with decreasing temperature to short-wavelengths. The phase difference of ordinary and extraordinary light waves for &lambda;&gt;&lambda;<sub>0</sub> and &lambda;&lt;&lambda;<sub>0</sub> was determined. The band in reflection spectra observed at the isotropic wavelength has a small halfwidth (3-5 &Aring;). Another isotropic wavelength was found in the short-wavelength region (433 nm) for crystals obtained by iodine transport method. &nbsp;</p></description>
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