UV to mid-IR Nonlinear Spectroscopy for Characterizing Defects in Dielectrics and Ferroelectrics
Abstract
The acquisition of a 5 KHz RegA Ti:Sapphire Amplifier and an OPA system is proposed. Thisfacility will make possible the investigation of defects and phase separations in dielectric andferroelectric oxides by nonlinear optical spectroscopy spanning from ultraviolet to mid- infraredlight wavelength range. Such wavelength extension is deemed necessary for our nonlineardetections in order to be able to separate responses from different types of defects and thereby tounderstand the break-down and phase separation mechanisms of dielectrics and ferroelectrics.Several classes of materials under development in the AFOSR Aerospace Materials for ExtremeEnvironment Program will be investigated by a multitude of nonlinear optical methods includingthe second harmonic generation, two color pump probe spectroscopy, and of course confocalsecond harmonic generation microscopy. Most of the proposed topics involve close collaborationwith other participants from the Aerospace Materials for Extreme Environment Program. Theseinclude spatial and temporal phenomena of the ionic defect electromigration, space chargeaccumulation, ionic degradation, and electrical and thermal breakdown at interfaces inprototypical dielectrics, and the creation and optimization of micro domain structures offerroelectric thin films for high performance energy storage applications.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Sep 11, 2017
- Source ID
- FA95501710342
Entities
People
- Yuhang Ren
Organizations
- Air Force Office of Scientific Research
- Research Foundation of The City University of New York
- United States Air Force