Submitted on: 17 December 1998.
Revised on: 02 April 1999.
Accepted on: 24 April 1999.
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Submitted on: 14 May 2004.
Revised on: 30 July 2004.
Accepted on: 21 August 2004.
___________________JOURNAL OF OPTOELECTRONICS AND ADVANCED MATERIALS
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Submitted on: 12 October 2002.
Revised on: 21 January 2003.
Accepted on: 10 March 2003.
___________________JOURNAL OF OPTOELECTRONICS AND ADVANCED MATERIALS
Submitted on: 30 June 1999.
Revised on: 04 August 1999.
Accepted on: 07 September 1999.
___________________JOURNAL OF OPTOELECTRONICS AND ADVANCED MATERIALS
Submitted on: 02 June 2018.
Revised on: 30 June 2018.
Accepted on: 29 July 2018.
___________________JOURNAL OF OPTOELECTRONICS AND ADVANCED MATERIALS
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Submitted on: 17 February 2001.
Revised on: 31 March 2001.
Accepted on: 22 April 2001.
___________________JOURNAL OF OPTOELECTRONICS AND ADVANCED MATERIALS