Accession Number : ADA323322

Title :   Optical and Magnetic Resonance Characterization of Point Defects in Nonlinear Crystals.

Descriptive Note : Final rept. 15 May 95-14 May 96,

Corporate Author : WEST VIRGINIA UNIV MORGANTOWN DEPT OF PHYSICS

Personal Author(s) : Halliburton,

PDF Url : ADA323322

Report Date : MAY 1996

Pagination or Media Count : 16

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.

Descriptors :   *OPTICAL PROPERTIES, *NONLINEAR OPTICS, *POINT DEFECTS, *MAGNETIC RESONANCE, PHOTOLUMINESCENCE, RAMAN SPECTROSCOPY, ABSORPTION SPECTRA, ELECTRON TRANSITIONS, ENERGY BANDS, PHOSPHORUS, DECOMPOSITION, NEAR INFRARED RADIATION, ELECTRON PARAMAGNETIC RESONANCE, FOURIER SPECTROSCOPY, CADMIUM COMPOUNDS, ZINC COMPOUNDS, ELECTRON NUCLEAR DOUBLE RESONANCE.

Subject Categories : Inorganic Chemistry
      Optics
      Atomic and Molecular Physics and Spectroscopy

Distribution Statement : APPROVED FOR PUBLIC RELEASE