Prof. Sankar De

Oral contributory Talk titled ‘Correlated vortex generation in coherent medium’ in the International Conference and Exposium on Quantum Sensing and Metrology organized by CQuERE, TCG Crest, Kolkata from 10th to 13th September 2025. Oral contributory Talk titled ‘Intra-molecular scattering within diiodoacetylene’ in the 29th International Symposium on Ion – Atom Collisions held at Kyoto University, Japan from 25th – 27th July 2025. Invited Talk titled ‘Intra-molecular scattering within dissociating diiodoacetylene’ in the ASI Symposium 004 on Genesis and Evolution of Organics in Space (2nd Symposium of OIS) held at GITAM, Bangaluru from 16th to 18th July 2025. Invited Talk titled ‘Coherent control in Rb atoms: Non-adiabatic transient response in EIT and Correlated vortex generation’ in the International conference on Quantum Many-body Systems (ICQMS 2025) held at Manipur University, Imphal from 26th to 28th June 2025. Invited Talk titled ‘Intra-molecular scattering in multiply charged diiodoacetylene’ in the conference on the ECR and Accelerator-Based Atomic Molecular Physics and Related Topics (ECAAMP-2025) held at Tata Institute of Fundamental Research (TIFR), Mumbai from 6th to 8th March 2025. Invited Talk titled ‘Spectroscopy in the Zeeman sub-levels of Rb atoms: power broadening immune EIT and transient response in the buffer medium’ in the National Conference on Nanotechnology, Material Science, and Advanced Optics held at Sister Nivedita University (SNU), Kolkata on 21st and 22nd January 2025. Invited Talk titled ‘Dissociation of diiodoacetylene (C2I2) by ion impact’ in the 24th National Conference on Atomic and Molecular Physics (NCAMP 2025) organized by ISAMP and held at IIT (ISM) Dhanbad from 8th to 11th January 2025. Invited Talk titled ‘Ion induced dissociation pathways of diiodoacetylene’ in the National Seminar on Recent Trends in Atomic Collision Physics held at Ramakrishna Mission Residential College (RMRC), Kolkata on 20th and 21st December 2024. Invited Talk titled ‘Coherent control in Rb atoms: power broadening immune EIT, generation of FWM light and transient dynamics of probe transmission’ in the Two-day workshop on Ion-trap and cold atom-based quantum simulations and quantum metrology held at Indian Association for the Cultivation of Science (IACS), Kolkata on 16th and 17th December 2024. Invited Talk titled ‘Probing molecular dynamics using two colour and pump – probe spectroscopy’ in the 9th Topical Conference on Ultrafast Photonics and Quantum Science organized by ISAMP and held at Physical Research Laboratory (PRL), Ahmedabad from 15th to 17th February 2024. Invited Talk titled ‘Probing molecular dynamics using two colour and pump – probe spectroscopy’ in the 9th Topical Conference on Ultrafast Photonics and Quantum Science organized by ISAMP and held at Physical Research Laboratory (PRL), Ahmedabad from 15th to 17th February 2024.   Invited Talk titled ‘Experimental methods for Interatomic Coulombic Decay (ICD) and quantum dynamics’ in the ICD Days: International Workshop on ICD and Quantum Dynamics held at IIT Madras from 14th to 15th February 2024. Invited Talk titled ‘Ion-induced Molecular Fragmentation Dynamics’ in the 1st symposium on Genesis and Evolution of Organics in Space held at Indian Institute of Space Science and Technology (IIST), Trivandrum during 18th to 20th January 2024. I am also a member of the Organics in Space pan-India workgroup. Invited Talk titled ‘Magnetometry using electromagnetically induced transparency and Efficient Four Wave Mixing in pulsed regime’ in the Joint IACS – IISER Kolkata Workshop on Quantum Sensing and Metrology held at Indian Association for the Cultivation of Science (IACS), Kolkata during 4th to 6th December 2023. Invited Seminar titled ‘Exploring FRENA as a Clinical Diagnostic Tool’ in the School-cum-workshop on Low Energy Nuclear Astrophysics (SLENA-23) held at SINP, Kolkata during 7th to 10th November 2023. Invited Talk titled ‘Controlling the coherent phenomena in Rubidium atoms’ in the 1st Raman Conference on Light and Matter Physics held at Raman Research Institute (RRI), Bangalore from 14th to 18th August 2023. Invited Talk titled ‘Spectroscopy in the Zeeman sublevels of Rb using electromagnetically induced transparency’ in the school on Introduction to Precision Measurements and Quantum Metrology (PMQM-2023) hosted through International Centre for Theoretical Sciences (ICTS), Bangalore from 10th to 21st July 2023. Invited Talk titled ‘Vector magnetometry using electromagnetically induced transparency’ in the 23rd National Conference on Atomic and Molecular Physics (NCAMP23) held at Indian Institute of Space Science and Technology (IIST) and Space Physics Laboratory, Trivandrum during 20th to 23th February 2023. Invited Talk titled ‘Vector magnetometry using electromagnetically induced transparency’ in the 7th Annual International Student Conference on Optics and Photonics (SCOP-2022) held at Physical Research Laboratory (PRL), Ahmedabad from 28th to 30th September 2022. Invited Talk titled ‘Effects of vector magnetic field on electromagnetically induced transparency with lin ⊥ lin polarization’ in the hybrid mode School + Discussion Meeting on Physics with Trapped Atoms, Molecules and Ions (TAMIONS-2022) hosted through International Centre for Theoretical Sciences (ICTS), Bangalore from 9th May to 13th May 2022. Contributory Talk (online) titled ‘Effects of vector magnetic field on electromagnetically induced transparency with lin ^ lin polarization’ in the 1st National Symposium on Quantum Enabled Science and Technology (QuEST) held at International Institute of Information Technology (IIIT) Hyderabad, India from 11th to 13th April 2022. Invited Talk titled ‘Frontiers in Quantum Optics: An application overview’ in the “Sir C V Raman Interdisciplinary Science Lecture Series” as a part of National Science Day Celebration 2022 held at Kolhan University, Chaibasa on 28th March 2022. I also took part in the poster and working model competition as one of the judges for the inter-college science exhibition held on 29th March 2022. Acted as the Session Chair and Moderator in the Online School + Discussion Meeting on Trapped Atoms, Molecules and Ions (TAMIons) hosted through International Centre for Theoretical Sciences (ICTS), Bangalore from 10th May to 22nd May 2021.   Invited Talk titled ‘Electromagnetically Induced Transparency: Quantum Memory and Atomic Magnetometry’ in the Summer School on Quantum Information and Quantum Technology (QIQT) held at Indian Institute of Science Education and Research (IISER) Kolkata, India on 2nd July 2021. Invited Talk titled ‘Frontiers in Quantum Optics: A brief perspective’ in the Webinar series on Recent Advances in Physics held at National Institute of Technology (NIT) Meghalaya, India from 14th to 18th September 2020.  Invited Talk titled ‘EIT based Atomic Vector Magnetometry’ in the International Conference on Atomic, Molecular, Optical and Nano Physics with Applications (CAMNP-2019) held at Delhi Technological University, India from 18th to 20th December 2019. Invited Talk titled ‘Rubidium Atoms: From Spectroscopy to Quantum Optics’ in the School on Know Your Elements (KYE-2019) held at Saha Institute of Nuclear Physics (SINP), India from 4th to 10th August 2019. Invited Lectures titled ‘Electromagnetically Induced Transparency: Its many experimental Wonders’ in the Session on Quantum Optics and Quantum Metrology, Summer School on Quantum Information and Quantum Technology (QIQT) held at Indian Institute of Science Education and Research (IISER) Kolkata, India on 8th July 2019. Contributed Talk titled ‘Controlling the coherent phenomena in an N-type atomic system’ – Workshop on Optical Nanofibre Applications (ONNA), Okinawa Institute of Science and Technology (OIST) Graduate University, Okinawa, Japan, 3rd – 6th June, 2019. Chairing a session at the National Conference on Atomic, Molecular and Nano Sciences (NCAMNS-2019) in the Department of Physics, Aliah University, Kolkata, 3rd – 4th April, 2019. Invited Talk titled ‘Polarization Rotation in a Coherent Atomic Medium’ – 22nd National Conference on Atomic and Molecular Physics (NCAMP-2019), IIT Kanpur, India, 25th – 28th March, 2019. Invited Talk titled ‘A brief roadmap in the applications of Quantum Optics’ – One day seminar on the Frontiers in Light – Matter Interactions, Aliah University, India, 14th January, 2019. Invited Talk titled ‘Controlling the coherent phenomena in N-type atomic system’ - International Conference on Quantum & Atom Optics, IIT Patna, India, 16th – 18th December, 2018. Invited Talk titled ‘Observation of slow light in V-type electromagnetically induced transparency’ - Workshop on Dynamics of Ultracold Systems with Embedded Highly-excited Rydberg Atoms, IISER Bhopal, India, 22nd – 24th October, 2018. Invited Talk titled ‘Developing methods for controlled localization and storage of light pulses’ – Discussion meeting on ‘Quantum Optics & Quantum Technology’, Indian Association for the Cultivation of Science, Kolkata, India, 8th June, 2017. Invited Talk titled ‘Probing ultrafast molecular dynamics with few-cycle infrared laser pulses and CEP control’ - Workshop on ‘Frontiers in Attosecond Science and Technology (FAST)’ organized by Indian Institute of Science Education and Research (IISER), Mohali, India and Max Planck Society, 6th March, 2017. Invited Talk titled ‘Intra-molecular scattering within dissociative diiodoacetylene’ - International Conference ‘Frontiers in Theoretical and Applied Physics (FTAPS 2017)’, American University of Sharjah, United Arab Emirates, 22 – 25th February, 2017. Invited Talk titled ‘Ion-induced dissociation of Diiodoacetylene’ - Workshop on Low Energy Ion Beam (LEIB) facility, Inter-University Accelerator Centre, New Delhi, India, 3 – 4th November, 2015. Invited Talk titled ‘Dynamic field‐free orientation of polar molecules by intense two‐color femtosecond laser pulses’ - 8th Asian Symposium on Intense Laser Science (ASILS8), Institute of Atomic and Molecular Sciences, Academia Sinica, National Taiwan University, Taipei, Taiwan, 25th – 28th November, 2014. Invited Talk titled ‘Ion-induced dissociation dynamics of polyatomic molecules’ – Seminar in the Quantum Science and Engineering Center, Kyoto University, Japan, 6th December, 2013. Invited Talk titled ‘Tracking wave packets dynamics in oxygen molecules with few-cycle infrared laser pulses’ – Seminar in the Dept. of Chemistry, Osaka City University, Japan, 5th December, 2013. Invited Talk titled ‘Following wave packet dynamics in diatomic molecules with few-cycle infrared laser pulses’ – Atomic Physics group seminar, Tokyo Metropolitan University, Japan, 2nd December, 2013. Invited Talk titled ‘Following dynamic nuclear wave packets in O2 and CO with few-cycle infrared laser pulses’ – M. Takahashi and K. Ueda groups’ joint seminar, Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, Sendai, Japan, 26th November, 2013. Invited Talk titled ‘Dynamic field-free orientation of polar molecules by intense two-color femtosecond laser pulses’ – DAE - BRNS Theme Meeting on Ultrafast Science (UFS 2013), IIT Kharagpur, India, 24th – 26th October, 2013. Invited Talk titled ‘Following wave packet dynamics in diatomic molecules with few-cycle infrared laser pulses’ – One-day seminar on ‘Laser and its Applications’, Department of Instrumentation Science, Jadavpur University, India, 6th February, 2013. Invited Talk titled ‘Signature of vibrational flopping in dissociative acetylene’ - Joint Symposium on Collisions of Highly-Charged Ions with Molecules and Related Topics, Tokyo Metropolitan College of Industrial Technology, Shinagawa, Tokyo, Japan, 18th October, 2012. Chairing a session at the Joint Symposium on Collisions of Highly-Charged Ions with Molecules and Related Topics, Tokyo Metropolitan College of Industrial Technology, Shinagawa, Tokyo, Japan, 18th October, 2012. Colloquium Talk titled ‘Ion-induced Molecular Fragmentation’ – Engineering and Applied Science Colloquium, Sophia University, Chiyoda, Tokyo, Japan, 16th October, 2012. Chairing a Session on ‘Ion - molecule collisions’ at the Accelerator based Atomic Physics Workshop, Inter-University Accelerator Centre, New Delhi, 8 – 9th August, 2012. Invited Talk titled ‘Aligning Molecules: Technique and Application’ – Applied Nuclear Physics (ANP) Division, Saha Institute of Nuclear Physics (SINP), Kolkata, India, 21st April, 2011. Invited Talk titled ‘Probing ultrafast molecular dynamics using a pump-probe approach’ - ANP Division, SINP, Kolkata, India, 12th October, 2010. ‘Probing molecular dynamics using a pump-probe approach with velocity map imaging spectrometer’ - AMO Seminars, James R. Macdonald Laboratory, Department of Physics, Kansas State University, USA, 3rd March, 2010. Invited Talk titled ‘Probing ultrafast dynamics in molecular dissociation’ – Nuclear and Atomic Physics Division, SINP, Kolkata, India, 26th November 2009. Invited Talk titled ‘Ion-induced dissociation dynamics of acetylene’ - 20th International Conference on the Application of Accelerators in Research and Industry (CAARI 2008), Fort Worth, Texas, USA, 2008. ‘Ion-induced dissociation dynamics in molecules’ – AMO Seminars, James R. Macdonald Laboratory, Department of Physics, Kansas State University, USA, 6th February, 2008. Invited Talk titled ‘Rearrangement reactions: Probing dissociation dynamics in molecules’ - One-day symposium on ‘Vistas of the Present-day Physics Research’ organized by ‘Indian Physical Society’, SINP, Kolkata, India, 30th March, 2007. ‘Fragmentation of Molecules by Ion Impact’ - Thesis presentation, XVIth National Conference on Atomic and Molecular Physics (NCAMP), Tata Institute of Fundamental Research, Mumbai, India, 2007.