Accession Number:

AD0750364

Title:

Measurement of the Angular Distribution of Photoelectrons from Third Generation Photocathode Materials,

Descriptive Note:

Corporate Author:

ARMY ELECTRONICS COMMAND FORT BELVOIR VA NIGHT VISION LAB

Personal Author(s):

• Pollard,John H.

Report Date:

1972-01-01

Pagination or Media Count:

14.0

Abstract:

The experimental measurements of the angular distribution of photoemitted electrons from cesium-oxygen activated p-type GaAs surfaces shows a highly directional photoemission approximately independent of the surface orientation. The mathematical model explaining these observations shows the expected Lambertian distribution is modulated by a strong exponential function resulting from the attainment of negative electron affinity conditions.

Descriptors:

• (*SEMICONDUCTOR DEVICES
• PHOTOCATHODES)
• (*PHOTOCATHODES
• PHOTOELECTRIC EFFECT)
• (*IMAGE INTENSIFIERS(ELECTRONICS)
• PHOTOCATHODES)
• GALLIUM ARSENIDES
• INFRARED RADIATION
• MATHEMATICAL MODELS

Subject Categories:

• Electrooptical and Optoelectronic Devices

Distribution Statement:

APPROVED FOR PUBLIC RELEASE