Interference of birefractive waves in CdGa2S4 crystals(
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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 (no) and extraordinary (ne) light waves are defined. The spectral dependence Δn=ne-no 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