SPS Seminar (Online)
School of Physical Sciences
Jawaharlal Nehru University
Title: Optical trapping with femtosecond pulses: Excitements, challenges and opportunities
Speaker: Dr. Arijit Kumar De
Associate Professor, Department of Chemical Sciences, IISER Mohali
Date: 28 July 2021 (Wednesday) Time: 4:00 PM
Zoom Meeting ID: 997 7689 0577, Passcode: CS@SPS
Abstract
The theme of research in our group is to explore, through a combination of theory and experiment, a wide range of problems in condensed phase dynamics with applications in chemistry, biophysics and condensed matter physics. Following a quick overview of the different state-of-the-art spectroscopic techniques developed by us to explore ultrafast energy and charge transfer dynamics in a variety of systems, in this talk I will mainly focus on elaborating the concept of ‘escape potential’, arising from nonlinear optical force under femtosecond pulsed excitation, which was first theoretically envisaged by us and subsequently demonstrated through meticulous experiments. I will further discuss how we can harness optical nonlinearity to reverse the direction of force or to split a single trapping potential well into many wells which is promised to have far reaching applications in facile and controlled optical manipulation.
References (on optical trapping):
1. A. Devi and A. K. De, Optics Express, 21485-21496, 24(9), 2016.
2. A. Devi and A. K. De, Physical Review A, 023856 (1-9), 96(2), 2017.
3. A. Dev and A. K. De, Journal of Optics (IOP Publishing), 065504 (1-6), 2017.
4. A. Devi and A. K. De, Journal of the Optical Society of America B 35(2), 19(6), 244-250, 2018.
5. A. Devi and A. K. De, Journal of Optics (IOP Publishing), 065502 (1-8), 21, 2019.
6. A. Devi, S. S. Nair, and A. K. De, EPL (Europhysics Letters), 28002 (1-7), 126, 2019.
7. A. Devi and A. K. De, JNP Letters (Journal of Nanophotonics), 020501 (1-8), 13(2), 2019.
8. S. Yadav, A. Devi and A. K. De, Physical Review A, 023509 (1-9), 102, 2020.
9. A. Devi and A. K. De, Physical Review A, 043511 (1-7), 102 (4), 2020.
10. A. Devi, S. Yadav and A. K. De, Applied Physics Letters, 161102 (1-6), 117 (16), 2020.
11. A. Devi and A. K. De, Physical Review Research, 043378 (1-5), 2 (4), 2020.
12. A. Devi and A. K. De, Optics Communications, 126440 (1-12), 482, 2021.
13. A. Devi, S. S. Nair, S. Yadav and A. K. De, Nanoscale Advances, 3288-3297, 3 (11), 2021.
14. A. Devi and A. K. De, Physical Review Research, 033074 (1-21), 3, 2021.