Wannier–Mott excitons in GaSe single crystals
V.V. Zalamai, N. N. Syrbu, I.G. Stamov, S. I. Beril
Abstract
Abstract The absorption, reflection and photoluminescence spectra of GaSe crystals with different thicknesses (100 nm–1 mm) were investigated in a wide temperature interval (300 K–10 K). Features due to excitonic states in the spectra were recognized. The contours of the excitonic reflection spectra measured at 10 K were calculated by dispersion equations. On the basis of these calculations, the parameters of the observed excitons were determined. Photoluminescence spectra from the cleaved surface and from the uncleaved facet of a sample were measured at low temperatures.
Topics & Concepts
ExcitonPhotoluminescenceMaterials scienceReflection (computer programming)Spectral lineFacet (psychology)Dispersion (optics)OpticsAbsorption (acoustics)Molecular physicsCondensed matter physicsAbsorption spectroscopyPhysicsOptoelectronicsQuantum mechanicsBig Five personality traitsComputer scienceComposite materialPersonalitySocial psychologyProgramming languagePsychologySolid-state spectroscopy and crystallographyPhase-change materials and chalcogenidesNonlinear Optical Materials Research