stays abroad
Invited Stays and visits elsewhere and abroad as a 'visiting scientist' or 'scientific visitor' (long term and very short term)
| period | Institute | Country | Ext* |
| Nov 17, 2019 | Veer Bahadur Singh Purvanchal University (VBSPU), Jaunpur | India | S |
| Nov 15, 2019 | Banaras University, Varanasi | India | VS |
| Nov 13-14, 2019 | Goa University, Goa | India | S |
| Aug 8, 2019 | Eastern University of Sri Lanka, Batticaloa | Sri Lanka | VS |
| June 5, 2013 | McGill University, Montreal | Canada | VS |
| Oct 1, 2012 | University of South Carolina, Columbia | SC, USA | VS |
| June 2011 | FEMTO-ST, Besancon | France | S |
| Dec 3, 2008 | University of Allahabad, Allahabad | India | VS |
| Dec 7-9, 2008 | Indian Institute of Science, Bangalore, Department of Mechanical Engineering | India | VS |
| Dec 10-14, 2008 | Indian Institute of Technology Madras, Centre for Nondestructive Evaluation, Chennai | India | |
| Dec 3, 2007 | The University of Texas at Austin, Mechanical Engineering Department | TX, USA | VS |
| Nov 27, 2007 | Department of Physics and Astronomy, The University of Mississippi | MS, USA | VS |
| Nov 26, 2007 | Western Kentucky University, Department of Physics and Astronomy | KY, USA | VS |
| Oct 8, 2007 | Department of Mechanical Engineering, University College of London (UCL), London | UK | VS |
| June 2007 | The Laboratory for Acousto-Optics and Solid State Acoustics of Prof. Dr. Mack Breazeale, The National Center for Physical Acoustics (NCPA), The University of Mississippi (Ole Miss), Oxford | MS, USA | L |
| Spring 2007 | Institute for Biomedical Technology, Ghent University Hospital Site, Gent | Belgium | VS |
| Jan 2007 | The Laboratory for Acousto-Optics and Solid State Acoustics of Prof. Dr. Mack Breazeale, The National Center for Physical Acoustics (NCPA), The University of Mississippi (Ole Miss), Oxford | MS, USA | S |
| Dec 2006 | Institut des NanoSciences de Paris, Université Pierre et Marie Curie, 140, rue de Lourmel - 75015 Paris | France | VS |
| Dec 2006 | Institut d'Electronique, de Microelectronique et de Nanotechnologie Département ISEN 41, Boulevard Vauban, 59046 Lille cedex | France | VS |
| Nov 2006 | Fraunhofer Institute for Nondestructive Testing, Saarbrucken | Germany | VS |
| Oct 2006 | Laboratoire de Mécanique Physique, CNRS UMR 5469, Université Bordeaux 1, 351, Cours de la Libération, 33405 TALENCE cedex | France | VS |
| July 2006 | The Laboratory for Acousto-Optics and Solid State Acoustics of Prof. Dr. Mack Breazeale, The National Center for Physical Acoustics (NCPA), The University of Mississippi (Ole Miss), Oxford | MS, USA | L |
| June 2006 | The Department of Acousto-Optics and Laser Physics, Institute of Experimental Physics,University of Gdansk, Gdansk | Poland | L |
| March 2006 | Precision and Intelligence Laboratory, Tokyo Institute of Technology, , Yokohama | Japan | L |
| Feb 2006 | The laboratory for Air-coupled NDE, KATHO, VHTI department, , Kortrijk | Belgium | VS |
| Jan 2006 | The Department of Welding Engineering, Ohio State University, , Columbus | OH, USA | S |
| Jan 2006 | The Department of Engineering Science and Mechanics, Penn State University, State College (University Park) | PA, USA | S |
| Jan 2006, | The Woodruff School of Mechanical Engineering, The Georgia Institute of Technology, Atlanta | GA, USA | S |
| Jan 2006 | The Department of Physics and Astronomy, The College of Charleston, Charleston | SC, USA | S |
| Oct, 2005 | Georgia Tech Lorraine, , Metz | France | S |
| June 2005 | Laboratoire de Mécanique Physique, Université Bordeaux 1, UMR CNRS 5469, 351, cours de la libération, 33405 Talence | France | S |
| April 2005, | The Acoustics and Thermal Physics Section of the Department of Physics and Astronomy, Katholieke Universiteit Leuven | Belgium | S |
| Sept 2004 | Acousto-Optics Lab, Oscillation Physics Division, Department of Physics, M. V. Lomonosov Moscow State University | Russia | L |
| Sept 2004 | Lab of Acousto-Optic devices, Moscow State University of Metals and Alloys, Russia, September 2004 Acousto Optic-Lab of Prof S. V. Kulakov, St Petersburg State University of Aerospace Instrumentation | Russia | VS |
| Sept 2004 | Institute of Radio Engineering and Electronics, Russian Academy of Sciences, Moscow, Russia, September 2004 Dept of Ultrasonic Microscopy, Institute of Biochemical Physics, Russian Academy of Sciences, Moscow | Russia | L |
| June 2004 | The Laboratory for Acousto-Optics and Solid State Acoustics of Prof. Dr. Mack Breazeale, The National Center for Physical Acoustics (NCPA), The University of Mississippi (Ole Miss), Oxford | MS, USA | L |
| April 2004 | Precision and Intelligence Laboratory, Tokyo Institute of Technology, Yokohama | Japan | S |
| Dec 2003 - Jan 2004 | The Laboratory for Acousto-Optics and Solid State Acoustics of Prof. Dr. Mack Breazeale, The National Center for Physical Acoustics (NCPA), The University of Mississippi (Ole Miss), Oxford | MS, USA | L |
| July 2003 | The Department of Materials Engineering, The University of Moratuwa, Moratuwa | Sri Lanka | S |
| May 2003 | The Laboratory for Acousto-Optics and Solid State Acoustics of Prof. Dr. Mack Breazeale, The National Center for Physical Acoustics (NCPA), The University of Mississippi (Ole Miss), Oxford | MS, USA | L |
*S=short, VS=very short, L=long