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# John Budai <budaijd@ornl.gov>
# requesting 4 days, at minimum=2 days
# beamline 34ID-E, Correlations between local microstructure and optical properties request
# instrument 34ID-E microbeam
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# top:/home/www/beamtime-requests/req01251.txt
# UNICAT Member Beam Time Request  #1251
# created Tue Sep 09 16:57:49 CDT 2008
####################################################

apsrun:
	2008-03

beamline:
	34ID-E

collaboration:
	No

collaborator_Wenjun:
	ON

contact:
	budaijd@ornl.gov

days:
	4

description:
	We will investigate a technique for combining spatially-resolved x-ray microdiffraction/microfluorescence and simultaneous measurements of the x-ray excited photoluminescence (PL) in order to study how local microstructure and composition control optical properties. For PL measurements, we will bring suitable collection optics and a miniature fiber optic spectrometer (Ocean Optics 1.1-6.2 eV). We will begin by studying local PL changes along individual EuAlO nanorods and in 2D scans of heteroepitaxial GaN and ZnO films grown on sapphire. By simultaneously mapping the spatial variations of the lattice and the PL spectra, we will be able to investigate structural mechanisms relevant in materials for light emission applications. In particular, we will correlate local defects (ie. grain boundaries), changes in composition and strain fields with local optical properties.

equipment_required:
	

experiment:
	Correlations between local microstructure and optical properties request

foreign_nationals:
	

hazards:
	none

instrument:
	34ID-E microbeam

instrument_other:
	

minimumdays:
	2

name:
	John Budai

new_request:
	ON

nonmembers:
	

submit:
	Submit

unacceptable_dates:
	October 1-10 and October 20-26

z34ID_change_undulator:
	yes

z34ID_details:
	The microdiffraction and PL measurements on 34ID-E can likely be done in parasitic mode under typical off-axis conditions. Microfluorescence will probably require on-axis control mode. Although control is preferred, if only parasitic time is available it is possible to omit the fluorescence measurements at this point.

z34ID_on_axis:
	yes

z34ID_parasitic:
	yes

z34ID_taper:
	no


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