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Photonic stop band effect in ZnO inverse photonic crystal

DSpace at IIT Bombay

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Title Photonic stop band effect in ZnO inverse photonic crystal
 
Creator KEDIA, S
VIJAYA, R
RAY, AK
SINHA, S
 
Subject OPAL
Photonic crystals
Self-assembly
Emission
Photoluminescence
 
Description Three-dimensional photonic crystals are fabricated using inward-growing self-assembly technique from polymethyl methacrylate (PMMA) colloids. Their air voids are infiltrated with zinc oxide (ZnO) by sot-gel method and the PMMA template is removed by the two independent processes of heat treatment and wet chemical method resulting in ZnO inverse photonic crystal. The inversion is confirmed from the structural characterization. In X-ray diffraction (XRD) experiment, the ZnO inverse photonic crystals obtained by both the techniques do not show any signature of single-crystalline ZnO. The inverse photonic crystals obtained by chemical method are further heated at different temperatures and XRD confirms crystalline nature of ZnO for temperature treatment at 400 degrees C. Laser-induced emission studies on ZnO inverse photonic crystals are carried out at two different excitation wavelengths. Excitation with 355 nm enables the observation of the stop band effect for emission at 45 degrees from the inverse crystal obtained by the inexpensive chemical method. (C) 2010 Elsevier B.V. All rights reserved.
 
Publisher ELSEVIER SCIENCE BV
 
Date 2012-06-26T07:47:11Z
2012-06-26T07:47:11Z
2011
 
Type Article
 
Identifier OPTICAL MATERIALS,33(3)466-474
0925-3467
http://dx.doi.org/10.1016/j.optmat.2010.10.020
http://dspace.library.iitb.ac.in/jspui/handle/100/14173
 
Language English