Accession Number : AD0887875

Title :   Electroreflectance. Part 1. Electroreflectance and the Semiconductor Surface.

Descriptive Note : Technical publication,

Corporate Author : NAVAL WEAPONS CENTER CHINA LAKE CALIF

Personal Author(s) : Seraphin,Bernhard O.

Report Date : AUG 1971

Pagination or Media Count : 20

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 a function of the surface potential and can therefore be used as a reference property. Calibration of this reference against surface conductance or surface capacity in the field-effect or electrolytic version of the method, respectively, establishes the functional relationship and suggests surface investigations by strictly optical means. Quantitative interpretation of electroreflectance spectra in band structure analysis requires control over the potential distribution in the various space-charge regions. In the electrolytic method, strict conditions for polarization and modulation must be satisfied to make line-shape discussions of electroreflectance spectra meaningful. (Author)

Descriptors :   (*SEMICONDUCTORS, OPTICAL PROPERTIES), (*BAND THEORY OF SOLIDS, SEMICONDUCTORS), SURFACE PROPERTIES, REFLECTIVITY, ELECTROCHEMISTRY, GERMANIUM, ELECTRIC FIELDS

Subject Categories : Solid State Physics

Distribution Statement : APPROVED FOR PUBLIC RELEASE