Accession Number : AD0620638

Title :   QUANTUM THEORY OF OPTICAL BEATING IN PHOTOCONDUCTORS,

Corporate Author : ILLINOIS UNIV URBANA

Personal Author(s) : Penchina,C. M.

Report Date : 1964

Pagination or Media Count : 9

Abstract : The quantum theory of optical beating in photoconductors is examined. A model is considered in which electrons, initially in a nearly filled band are optically excited to the next higher empty band. It is assumed that the energy gap between these two bands is much greater than kT. For ohmic material with a steady bias voltage, the change in current is proportional to the number of electrons excited by the radiation. Thus, to determine the photosignal, the total number of electrons excited by the radiation is calculated as a function of time. Results demonstrate that the recombination lifetime limits the resolution with which a photoconductive detector can distinguish between 2 light beams. (Author)

Descriptors :   (*LIGHT, INTERFERENCE), (*LASERS, LIGHT), (*PHOTOELECTRIC MATERIALS, QUANTUM THEORY), PHOTOCONDUCTIVITY, OPTICAL PROPERTIES, RESOLUTION, EXCITATION, ELECTRICAL CONDUCTIVITY

Distribution Statement : APPROVED FOR PUBLIC RELEASE