Invited Talks
- "Ion Beams from Plasmas Driven by Electromagnetic Waves : Physics and Applications", Plenary lecture- 22nd National Conference on Atomic and Molecular Physics (NCAMP-20 19), Indian Institute of Technology-Kanpur, Kanpur, India, 25 - 28, March (2019).
- "Capillary Guiding and Sub-Micron Structuring using Ion Beams from Microwave Plasmas in a Multicusp", Plenary lecture - International Conference on Photonics, Metamaterials & Plasmonics (PMP 2019), Jaypee Institute of Information Technology, Noida, India, 14 - 16, February (2019).
- "Capillary Guiding and Sub-Micron Structuring using Ion Beams from Microwave Plasmas in a Multicusp", 27th International Toki Conference and 13th Asia Pacific Plasma Theory Conference (received invitation as an invited speaker but could not attend), Ceratopia Toki, Toki-city, Gifu, Japan, November 19-22 (2018).
- "Ion Beams from Plasmas Driven by Electromagnetic Waves : Physics and Applications", Keynote lecture - 6th PSSI Plasma Scholars Colloquium (received invitation as a key note speaker but could not attend), Sikkim Manipal Institute of Technology, Majitar, Sikkim, 24 - 26, August (2018).
- "Pulse Modulated Wave Induced Plasma States And Self Excited Instability", Physics Research Workshop, IIT Kanpur, February 6 - 7 (2016).
- "Pulse modulated wave induced plasma states and self excited instability", 30th National Symposium on Plasma Science and Technology (PLASMA 2015), Saha Institute of Nuclear Physics, Kolkata, December 1 - 4 (2015).
- "Direct writing using microwave plasma based multi-element focused ion beams : focusing, diagnostics and micro-structuring", Workshop on the use of low energy ion beam (WIB15), Institute of Physics, Bhubaneshwar, November 7 - 9 (2015).
- "Wave interaction with plasmas confined in multicusp magnetic fields ", Plasma Scholars Colloquium (PSC 2015) , Jadavpur University, Kolkata, India, August 6 - 7 (2015).
- "Negative ion beams from compact microwave plasmas: volume generation, measurement and wave induced phenomena", The 6th Collaborative Forum between Shizuoka University Japan and the National Fusion Science (NIFS), Shizuoka University, Japan, February, 26 (2015).
- "Birth of a wave induced plasma : electron random walk, energy distribution and gaseous breakdown", Lecture 5, Shizuoka University, Japan, March, 16 (2015).
- "Pulse modulated microwave plasmas : self excited instability and plasma states", Lecture 4, Shizuoka University, Japan, March, 9 (2015).
- "Multi-element focused ion beamlets for localized low energy ion matter interactions", Lecture 3, Shizuoka University, Japan, March, 5 (2015).
- "Genesis of focused ion beams for plasma nanotechnology using a bounded microwave plasma source with sub-wavelength inhomogeneities", Colloquium, Shizuoka University, Japan, March, 3 (2015).
- "Physics of negative ion containing plasmas : volume generation, measurement and wave induced phenomena", Lecture 2, Shizuoka University, Japan, February, 24 (2015).
- "Micron focusing, diagnostics and structuring using multielement ion beams from intense microwave plasmas", Lecture 1, Shizuoka University, Japan, February, 17 (2015).
- "Dispersion and Waves in Bounded Plasmas with Subwavelength Inhomogeneities: Focused Ion Beams for Plasma Nanotechnology", Workshop associated with 8th International Conference on Reactive Plasmas (ICRP) and 31st Symposium on Plasma Processing (SPP), Fukuoka, Japan, February 3 - 7 (2014).
- "Nanoscale physics and applications using multi element focused ion beams from intense collimated plasmas ", International conference on recent trends in Applied Physics and Materials Science (RAM2013) (Member of Advisory Committee), Bikaner, Rajasthan, February, 1 – 2 (2013).
- "Dispersion and Waves in Bounded Plasmas – Genesis of MEFIB", International conference in complex processes in plasmas and nonlinear dynamical systems (ICCPPNDS-2012), Gandhinagar, Gujarat, India, November, 6 - 9 (2012).
- "Coexistence of tunneling and displacement currents in a nano gap driven with ac fields", BITs 2nd Annual World Congress in Nano Science and Technology, Qingdao, China, October 26 - 28 (2012).
- "Experimental investigation of space-charge-limited flows in the quantum regime", International Conference on Materials Science and Technology (ICMST 2012), St. Thomas College, Pala, Kerala, India, June 10 - 14 (2012).
- "Dispersion and Waves in Bounded Plasmas : Genesis of a Novel Focused Ion Beam System (MEFIB)", Department of Instrumentation Science, Jadavpur University, Kolkata, India, April, 02 (2012).
- "Micro and Nano Focused Ion Beams for New Physics and Applications", Orientation Workshop on Radiation Science and Applications, Christ Church College, Kanpur, India, February, 10-11 (2012).
- "Nanoscale Physis and Applications Using Multi Element Focused Ion Beams", BIT's 1st Annual World Congress in Nano Science and Technology, Dalian, China, October, 23-26 (2011).
- "Multi-element focused ion beams: Concepts to Genesis of a Novel Device", Australian National University, Research School of Physics and Engineering, Canberra, Australia, October, 20 (2010).
- "Ion Beams, Plasma and Mesoscopic Physics: Concepts to Genesis of a Novel Device", Buti Foundation Award Lecture, Physical Research Laboratory, Ahmedabad, India, November, 11 (2009).
- "Waves, Plasmas, Ion Beams and Physics of Mesoscopic Systems", Special invited lecture, Center of Excellence (COE) Advanced Research Seminar, Research and Education Center of Nano Vision Science, Shizuoka University, Hamamatsu, Japan, December, 8 (2009).
- "Electromagnetic Wave assisted plasmas, Ion Beams, and Mesoscopic Physics: concepts to genesis of a Novel Device", National Conference on Atomic, Molecular and Nuclear Physics, MMH College, Ghaziabad, India, November, 5 (2009).
- "New Frontiers in Nanoscience and Technology using Microwaves for Generation of Multielement Focused Ion Beams", presented at the one day seminar Horizons of Microwave and Millimeter Wave Engineering and Research (Hommer), Department of Radio Physics and Electronics, University of Calcutta, India, August, 22 (2008).
- "Electromagnetic Wave interactions with an anisotropic plasma: Nonlinear phenomena, fluctuations, and stability", DST-PSSI interaction meeting on popularizing plasma science, technology and its applications in Indian Academic organizations, Institute for Plasma Research, Gandhinagar, India, August, 7 - 8 (2008).
- "Plasma based nanoscale science and technology with multielemental focused ion beams", Special invited lecture, Center of Excellence(COE) Advanced Research Seminar, Research and Education Center of Nano Vision Science, Shizuoka University, Hamamatsu, Japan, December, 19 (2007).
- "Subnanosecond electron transport in polarized electromagnetic waves and the quasi steady state interpulse plasma", 22nd National Symposium on Plasma Science and Technology (PLASMA2007),Institute for Plasma Research (IPR) and Plasma Science Society of India (PSSI), December, 6 (2007).
- "Microwave plasma sources for focused ion beams", Short Term Course on Plasma - Basics and Industrial Applications, Department of Chemical Engineering, Indian Institute of Technology - Kanpur, November, 3 (2007).
- "Multielemental Focused Ion Beams", Power Beams -2007, National Symposium on Ion Beam Technology and Applications, Bhabha Atomic Research Center, BRNS, Department of Atomic Energy, Government of India, Septemer, 20 (2007).
- "Development of a microwave plasma based negative ion source and study of plasma dynamics through a transverse magnetic filter in the negative ion source", Board of Research in Fusion Sciences, National Fusion Programme, NFP Experts Committee meetingsInstitute for Plasma Research, Gandhinagar, India, April, 4 (2007).
- "Study of physics at nanoscales: a new way of generating multielemental focused ion beams", Theme Meeting onHigh Current Ion sources (HCIS 06)Variable Energy Cyclotron Center, Department of Atomic Energy, Kolkata, April, 6 (2006).
- "Intense microwave plasmas for ion source applications", Plasma Science Society of India-Institute for Plasma Research (PSSI-IPR) workshop on National Fusion Programme: ITER and Beyond, Institute for Plasma Research, Gandhinagar, Novembr, 8 (2006).
- "Electromagnetic sources of THz radiation: toward efficient generation and control", Indo-French workshop on free electron lasers and their applications, organized by the Indo-French Centre for the promotion of advanced research (IFCPAR), Goa, India, March, 24 (2006).
- "Physics of intense microwave plasma ion sources for Radioactive Ion applications, ", DAE-BRNS, Indian Particle Accelerator Conference -2005, Variable Energy Cyclotron Center (VECC), Kolkata, March, 1 - 5 (2005).
- "Physics of intense electromagnetic wave plasma ion sources for multicharged ions: from high frequency to high power sources", Nuclear Science Center (NSC), New Delhi, March, 28 (2005).
- "Generation of chaotic radiation in a driven electromagnetic wave amplifier with time delayed feedback: a new approach to communication", Institute of Plasma Research (IPR), Gandhinagar, Colloquium, May, 25 (2005).
- "Electromagnetic sources of THz radiation: frequency upshift by a plasma", Institute of Plasma Research (IPR), Colloquium, Gandhinagar, May, 24 (2005).
- "High densityplasma generation using microwaves: new frontiers and applications", Short course in the Basics of Plasma and its Application in Integrated Circuit (IC) Fabrication,Indian Institute of Technology (IIT) Kanpur, October, 31 (2004).
- "Physics of High Density Microwave Plasmas at Subcutoff Conditions", Physics Department, Indian Institute of Science, Bangalore, India, August (2003).
- "Electromagnetic wave generated High Density Microwave Plasmas: New frontiers and applications", Physics Department, Indian Institute of Technology, Kanpur, India, August (2003).
- "Electromagnetic sources of THz radiation", Physics Department, Indian Institute of Technology, Kanpur, India, August (2003).
- "Physics and applications of intense collimated narrow cross sectional plasmas,", Physics Department Colloquium, University of North Bengal, Raja Rammohunpur, India, August (2003).
- "Investigations of folded waveguide TWT oscillators for THz radiation", Fourth International Vacuum Electronics Conference (IVEC)), Seoul, Korea, May (2003).
- "Physics of High Density Microwave Plasmas Beyond Cutoff Conditions", Physics Department Colloquium, New Mexico Tech, Socorro, NM, USA, March, 25 (2003).
- "Development of a high-power pulsed microwave ion source at RIKEN", Riken Distinguished Postdoctoral Fellows final project presentation, The Institute of Physical and Chemical Research (RIKEN), Saitama, Japan, February (2002).
- "Development of a high power microwave pulsed ion source at RIKEN,", Physics Department Colloquium, University of North Bengal, Raja Rammohunpur, India, August (2001).