Document Detail

A novel approach for normalizing the photoreflectance spectrum by using polymer-dispersed liquid crystal.
MedLine Citation:
PMID:  23126779     Owner:  NLM     Status:  In-Data-Review    
This study developed a novel type of normalization procedure for modulation reflectance spectroscopy experiments to obtain the relative change in the reflectance spectrum, ΔR∕R. This technique uses a polymer-dispersed liquid crystal to ensure that the dc component of the signal from the detector remained constant by varying the intensity of the light striking the sample. This method is particularly useful for photoreflectance measurement, which may encounter background problems because of scattered pump light and∕or photoluminescence. It does not require a change in the gain of the detector or the use of a variable neutral density filter mounted on a servo-motor.
Y F Liao; C C Chang; D P Wang; B H Tseng; Y D Liao; C H Lin
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  The Review of scientific instruments     Volume:  83     ISSN:  1089-7623     ISO Abbreviation:  Rev Sci Instrum     Publication Date:  2012 Oct 
Date Detail:
Created Date:  2012-11-06     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0405571     Medline TA:  Rev Sci Instrum     Country:  United States    
Other Details:
Languages:  eng     Pagination:  103904     Citation Subset:  IM    
Department of Physics, National Sun Yat-Sen University, Kaohsiung 804, Taiwan.
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