Eur. Phys. J. Special Topics 153, 263-266 (2008)
https://doi.org/10.1140/epjst/e2008-0441-5

Photoacoustic spectra of Zn_1-xBe_xTe near the energy gap

¹ Center for Multidisciplinary Studies, University of Belgrade, 11030 Belgrade, Serbia
² Instytut Fizyki, Uniwersytet Mikołaja Kopernika, ul. Grudziadzka 5/7, 87-100 Torun, Poland
³ Dept. of Electronics, Technical University of Koszalin, Sniadeckich 2, 75-328 Koszalin, Poland

Abstract

The results of experimental studies of optical and structural properties in bulk crystals of Zn_1-xBe_xTe (x = 0.02, 0.06 and 0.12) were presented. The amplitude and phase photoacoustic (PA) spectra were measured and analyzed in dependence on the wavelength of the excitation optical beam, at different frequencies of modulation, using the PA microphone (PAmic) and PA piezoelectric (PApze) spectroscopy methods. The differences in PA spectra of as grown and annealed in zinc vapor samples were observed.