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Nonlinear optical characterization and measurement of optical limiting threshold of CdSe quantum dots prepared by a microemulsion technique

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Title Nonlinear optical characterization and measurement of optical limiting threshold of CdSe quantum dots prepared by a microemulsion technique
 
Creator MATHEW, S
SARAN, AD
JOSEPH, SA
BHARDWAJ, BS
PUNJ, D
RADHAKRISHNAN, P
NAMPOORI, VPN
VALLABHAN, CPG
BELLARE, JR
 
Subject Z-SCAN TECHNIQUE
NANOPARTICLES
NANOCRYSTALS
POLYMER
ENHANCEMENT
ABSORPTION
EMISSION
CLUSTERS
CDTE
 
Description CdSe quantum dots prepared by micro emulsion technique shows quantum confinement effect and broad emission at 532 nm. These quantum dots have about 4.35 nm size, and they exhibit good nonlinear effects which are measured using z-scan technique. The samples have a reverse saturation in the nonlinear absorption as nonlinear optical absorption coefficient beta is 2.545 x 10(-10) W m(-1) and nonlinear optical refraction coefficient n(2) is -1.77 x 10(-10) esu. The third-order nonlinear optical susceptibility is found to be 4.646 x 10(-11) esu and also the figure of merit is 2.01 x 10(-12) esu m. The optical limiting threshold which is found to be 0.346 GW/cm(2) makes it a good candidate for device fabrication.
 
Publisher SPRINGER
 
Date 2014-10-15T16:00:59Z
2014-10-15T16:00:59Z
2012
 
Type Article
 
Identifier JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS, 23(3)739-745
http://dx.doi.org/10.1007/s10854-011-0481-z
http://dspace.library.iitb.ac.in/jspui/handle/100/15218
 
Language en