We have applied to semiconductors the thory of Brillouin scattering from corrugated surfaces developed previously. We have fitted the available spectra measured with 5145 A light in order to evaluate the elastooptic constants of the medium. For GaAs we found k_11=42.5 k_12=51, k_44=25.5. This is the first determination of these constants in GaAs at this wavelenght where other techniques are not applicable. For silicon we found k_11=53 k_12=25, k_44=23. It is also shown that in opaque semiconductors the elastooptic coupling depends strongly on the surface orentation.
Surface Brillouin Scattering from Acoustic Phonons: II. Application to Semiconductors / A., Marvin; Bortolani, Virginio; F., Nizzoli; Santoro, Giorgio. - In: JOURNAL OF PHYSICS. C. SOLID STATE PHYSICS. - ISSN 0022-3719. - STAMPA. - 13:(1980), pp. 1607-1616. [10.1088/0022-3719/13/8/030]
Surface Brillouin Scattering from Acoustic Phonons: II. Application to Semiconductors
BORTOLANI, Virginio;SANTORO, Giorgio
1980
Abstract
We have applied to semiconductors the thory of Brillouin scattering from corrugated surfaces developed previously. We have fitted the available spectra measured with 5145 A light in order to evaluate the elastooptic constants of the medium. For GaAs we found k_11=42.5 k_12=51, k_44=25.5. This is the first determination of these constants in GaAs at this wavelenght where other techniques are not applicable. For silicon we found k_11=53 k_12=25, k_44=23. It is also shown that in opaque semiconductors the elastooptic coupling depends strongly on the surface orentation.Pubblicazioni consigliate
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