Visited Singapore and Malaysia to attend 8-ACSSI, held at Langkawi, Dec.2000
Visited KERI (South Korea) under Brain Pool Fellowship Program [Nov. 2003- Nov.2004]
Visited Hanyang National University (South Korea) for a Technical Discussion [Aug.2007-Sep.2007]
Visited the University of Texas at Austin, USA under Raman research fellowship Program [June2009- October 2009]
Visited KERI (South Korea) under INSA-NRF Exchange Program of Scientists [Aug.2011-Sep.2011]
Visited Germany under CSIR-DAAD Exchange Programme [17-23 November 2019]