1. BSc in Physics,
Cotton College, Gauhati University, India, 2005
2. MSc in Physics,
IIT Guwahati, India, 2007
3. PhD: Michigan Technological University, USA, Title:
Geometry Induced Magneto-Optic Effects in LPE Grown Magnetic Films, 2015
- July 2007 - Feb 2008, Junior Research Fellow,
IISc, Bangalore, India
- Aug 2015 - Aug 2016, Research Assistant,
Michigan Technological University, Houghton, USA
- Sep 2017 - Dec 2019, Postdoctoral Fellow,
Radboud University, Nijmegen, Netherlands
- Jan 2021 - Mar 2022, Postdoctoral Fellow,
Charles University, Prague, Czech Republic
This self-explanatory video demonstrates a machine learning principle on a hardware assembly. I was mostly engaged by this Arduino-LabVIEW project when the COVID-19 was creating rampage in Europe.
Magnetic circular dichroism is a measure of absorption coefficients difference between right and left circularly polarized lights that coming out of a magnetized sample. Here, it is demonstrated how to convert a V-VASE ellipsometer into a MCD measurement setup. A mechanical stage holding two ring magnets with micro-adjustment screws is attached to the Ellipsometer stage. For further enhancement of ellipsometer beam intensity, two lenses are used and metal pin detector from the ellipsometer source is removed. MCD result from a sample is presented in this video for the proof.
Wet etching process is a very hard to control process in the area of micro-fabrication. This tool was build to etch magneto-optic sample in heated phosphoric acid environment. The tool uses micro-controller circuit to run two stepper motors and a dc motor. Basically, stepper motors are used here to give transnational motion to the sample and dc motor provides the spin to the sample in the acid bath. Thus, uniform etching of the sample is achieved.
This video talks about developing some simple exercises to get rid of coronavirus infections. These habits are backed by scientific measurements and hence will help people to follow them. To keep the video short, I could not touch deep on the performance of these exercises, therefore, I urge interested personals to contact me via my email at firstname.lastname@example.org. Lastly, I dedicate this video to all my near and dear ones whom I lost recently.
A. Chakravarty, J.H. Mentink, Sergey Semin, and Th. Rasing, ‘Training and pattern recognition by an opto-magnetic neural network’, Applied Physics Letter 120, 022403 (2022).
A. Chakravarty, J.H. Mentink, C. S. Davies, K. T. Yamada, A. Kimel and Th. Rasing, ‘Supervised learning of an opto-magnetic neural network with ultrashort laser pulses’, Applied Physics Letter 114, 192407 (2019).
O. V. Borovkova1, H. Hashim, M. A. Kozhaev, S. A. Dagesyan, A. Chakravarty, M. Levy, and V. I. Belotelov, ‘TMOKE as efficient tool for the magneto-optic analysis of ultra-thin magnetic films’, Applied Physics Letter 112, 063101 (2018).
Miguel Levy, A. Chakravarty, H.-C. Huang, R. M. Osgood, Jr. ‘Large magneto-optic enhancement in ultra-thin garnet films’, Applied Physics Letter 107, 011104 (2015).
A. Chakravarty, Miguel Levy, A. A. Jalali, Z. Wu, and A. M. Merzlikin, ‘Elliptical normal modes and stop band reconfiguration in multimode birefringent one-dimensional magnetophotonic crystals’, Physical Review B 84, 094202 (2011).
N. Dissanayake, Miguel Levy, A. Chakravarty, P. A. Heiden, N. Chen, and V. J. Fratello, ‘Magneto-photonic crystal optical sensors with sensitive covers’, Applied Physics Letter 99, 091112 (2011).
Miguel Levy, A. Chakravarty, Pradeep Kumar and Xiaoyue Huang, ‘Magnetophotonic Bragg Waveguides, Waveguide Arrays and Nonreciprocal Bloch Oscillations’, Publisher: Springer (April 2013).
Poster & Presentations
A. Chakravarty, ‘Opto-Magnetic Materials for Fundamental Study and Application’, Invited Speaker, ETOPIM11 Mini-symposium, Krakow, Poland, July (2018).
A. Chakravarty ‘Magneto-Optic Enhancement in Nano-Scale Iron Garnet Films’, Oral presentation, American Physical Society (APS) Meeting, Baltimore, Maryland, March (2016).