| Numéro |
J. Phys. Colloques
Volume 31, Numéro C1, Avril 1970
COLLOQUE SUR LES 'INTERACTIONS DES ÉLECTRONS, PHONONS ET MAGNONS AVEC LES SURFACES CRISTALLINES'
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| Page(s) | C1-123 - C1-134 | |
| DOI | https://doi.org/10.1051/jphyscol:1970121 | |
J. Phys. Colloques 31 (1970) C1-123-C1-134
DOI: 10.1051/jphyscol:1970121
ELECTROREFLECTANCE IN SURFACE PHYSICS
B. O. SERAPHIN1, 21 Physics Laboratory I, the Technical University of Denmark, Lyngby/Denmark
2 Optical Sciences Center, the University of Arizona, Tucson, Arizona 85721, U.S.A.
Abstract
Periodic modulation of the potential barrier inside the reflecting surface of a semiconductor results in a synchronous modulation of the reflectance. This electroreflectance effect is strongest near the photon energies of interband-transition thresholds and has therefore been explored mainly in relation to band structure analysis. Since phase, magnitude, and spectral distribution of the reflectance response depend upon the value of the surface potential around which the ac electric field modulates the potential barrier, the effect can also be used for the determination of the surface parameters by strictly optical means. A number of recent applications of the method to surface studies in semiconductors is reviewed in this lecture.