- Guest researcher at National Institute of Standards and Technology(NIST), Gaithersburg, Maryland, USA from June to July 2018
- DAAD re-invitation fellowship from 14th May to 26th July 2016.
- Kusuma Young Faculty Fellowship, Indian Institute of Technology Delhi, from 2012 to 2014.
- DAAD re-invitation fellowship from 17th May to 18th July 2012.
- German Academic Exchange Service (DAAD) Re-invitation fellowship in the year 2012.
- NASA postdoctoral Program (NPP) Fellowship, from 2008 to 2011.
- International Max Planck Research School (IMPRS) fellowship, from 2006 to 2007.
- German Academic Exchange Service (DAAD) fellowship, 2004 to 2006.