Submitted on: 31 January 2001.
Revised on: 13 February 2001.
Accepted on: 21 February 2001.
OPTICAL MATERIALS---ELSEVIER
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Submitted on: 30 March 2017.
Revised on: 08 April 2017.
Accepted on: 25 April 2017.
OPTICAL MATERIALS---ELSEVIER
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Submitted on: 29 May 2006.
Revised on: 07 July 2006.
Accepted on: 21 July 2006.
OPTICAL MATERIALS
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