Bikash Kumar Das is an expert in material science and classical optics, and offers freelance services at Kolabtree.
About the project
Presently, I’m working on a project titled “Vector vortex beam and their scattering for communication application”. In our Optics laboratory, we are devising new tools and techniques to generate vector vortex beam. Most recently, I proposed a technique where the use of a glan laser polarizer (GLP), a q-plate and a polarization sensitive spatial light modulator (SLM) generates vector vortex beam which is having undefined phase at the centre and non-uniform polarization profile as well. We used this beam in order to establish a secure communication between two ends (data will be encrypted securely) and encoded the optical information. Apart from Vector vortex beam, we also have generated Perfect optical vortex (POV) beams in our lab using an SLM (being operated in phase only mode), an axicon and a lens (performs the optical Fourier transform of Bessel Gauss Beams in order to generate the POV beam). Also, we scattered these beams through a ground glass plate (GGP) after which speckle patterns (a fine granular random pattern of light which are generated due to the interference of many scattered wavefronts from the inhomogenities present in the surface of a GGP) were generated. Then we took the correlation (auto as well as cross correlation) of two speckle patterns and used this correlation in order to establish classical communication.
About the author, Bikash Kumar Das
I work as a research fellow of physics in the project titled “Vector vortex beam and their scattering for communication application” funded by Science and Engineering Research Board (SERB), Department of Science and Technology (DST), Govt.of India.
Previously, I’d successfully completed two projects entitled “Growth of ZnO thin film on Silicon and Glass substrate by Pulsed Laser Deposition technique” at Institute of physics, DAE, Govt.of India as an Summer Student Visiting Program (SSVP) Fellow funded by Department of Atomic Energy (DAE) and “Effect of Gd, Ca doping on structural, magnetic and transport studied of SrMnO3 Perovskite” at Utkal University. Apart from that, I was the winner of Chancellor’s (Governor of Odisha) gold medal for securing the highest marks in my graduate degree at Utkal University and also receiver of many prestigious scholarships, fellowships and awards such as UGC Rank Holder Scholarship (2016-17), Institute of Mathematics and Application Scholarship (AIR-02), Khirgovind Merit Scholarship, Graduate Aptitude Test in Engineering (GATE), Joint Entrance Screening Test (JEST) etc.
I’m a fellow member of American Physical Society (APS), American Chemical Society (ACS), Optical Society of America (OSA), Asia Society of Researchers (ASR), Institute of Corrosion, and Cognitive Science Society (CSS).