Date of Award

12-1992

Document Type

Thesis

Degree Name

Master of Science

Department

Department of Engineering Physics

First Advisor

Paul H. Ostdiek, PhD

Second Advisor

Robert L. Hengehold, PhD

Third Advisor

Yung K. Yeo, PhD

Abstract

Zinc Germanium Phosphide (ZnGeP2) is a nonlinear semiconductor suitable for use as a laser tuning element over the two to six micron wavelength range. Although this crystal has been studied in the past, its luminescent properties are not yet well understood. In this present study, ZnGeP2 has been examined using cathodoluminescence spectroscopy (CL). Specifically, the spectral dependence of the CL was obtained as a function of electron beam energy, beam current and temperature. The resulting CL was found to be polarized with a peak structure that was dependent on the polarization. This peak structure observed by CL is difficult to detect by photoluminescence (PL). It is believed that the- peaks are due to transitions between the conduction band and the spin orbit split acceptor level ALI. It is also believed that the excitation mechanism is in part responsible for the different structure observed.

AFIT Designator

AFIT-GEP-ENP-92D-04

DTIC Accession Number

ADA258996

Comments

The author's Vita page is omitted.

Plain-text title form: Cathodoluminescence Spectroscopy of Zinc Germanium Phosphide ZnGeP2

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