Optical and Magnetic Resonance Characterization of Point Defects in Nonlinear Crystals.
Abstract
The research performed over one year was to use electron paramagnetic resonance (EPR) electron nuclear double resonance (ENDOR), fourier transform-infrared (FTIR) absorption. and other optical techniques to identify and characterize point defects in nonlinear optical materials. The materials studied were KTP, ZnGeP2, and CdGeAs2 families nonlinear optical crystals. Photoluminescence and micro-Raman techniques were found to be useful for clarifying the origin of near infrared emission in, and characterizing the decomposition process at the surface of KTP crystals. EPR spectra of ZnGeP2 indicate that near edge optical absorption is dominated by singly-ionized zinc vacancies, and large concentrations of phosphorus vacancy donors were present as well. Photoluminescence studies further support that the optical absorption is likely due to several overlapping bands arising from an acceptor-to-donor transition and band-to-defect transitions.
Document Details
- Document Type
- Technical Report
- Publication Date
- May 01, 1996
- Accession Number
- ADA325745
Entities
People
- Larry E. Halliburton
Organizations
- West Virginia University