Comparison of properties inherent to wave plates and Fresnel rhomb

Principles of functioning and technical characteristics of wave plates and Fresnel rhomb are analyzed, and the properties of these optical elements are compared. Main fields of application are discussed

Theoretical and experimental study of Raman scattering in mixed (MoS₂)x(MoSe₂)₁₋x layered crystals

Raman scattering in mixed MoS₂/MoSe₂ layer type crystals was investigated in this work. The change of intensities and positions of bands for in-plane E¹₂g and outof-plane A₁g vibrations as functions of the “concentration” inherent to corresponding type layers has been studied. Estimation of interlayer interaction was obtained from comparison of experiment and theory, and effect of this interaction on the frequency of intralayer phonon was studied

Saddle point excitonic resonances in BiI3 layered single crystals

Excitonic resonances near the critical saddle point of M₁ sort by van Hove have been revealed for the first time in the BiI₃ layered semiconductor. Their main parameters are estimated