Long wavelength longitudinal optical (LO) and transverse optical (TO) phonons of BeSe and layers are identified in a wide composition range by using Raman spectroscopy. A two-mode behavior is clearly evidenced. As predicted by the dielectric model of Hon and Faust, the eigenfrequencies of the BeSe- and ZnSe-like LO modes correspond to the maxima of Excellent agreement is obtained with a model where the calculations are performed by using the equations of motion and polarization derived from the modified random element isodisplacement model. Besides, the TO and LO frequencies for BeSe are determined to be 501 and 579 cm−1, respectively.
Skip Nav Destination
Research Article| July 24 2000
Raman study of alloy (100) epitaxial layers
J. P. Laurenti;
O. Pagès, M. Ajjoun, J. P. Laurenti, D. Bormann, C. Chauvet, E. Tournié, J. P. Faurie; Raman study of alloy (100) epitaxial layers. Appl. Phys. Lett. 24 July 2000; 77 (4): 519–521. https://doi.org/10.1063/1.127030
Download citation file: