1 citations · 1 across the 8 of their papers we have counts for
9 papers
Extended three dimensional optical tweezers with a Single Gaussian Beam in a stratified medium
Sramana Das, Suvajit Dey, Nirmalya Ghosh +2
We demonstrate a simple and effective approach for realizing extended volumetric optical trapping using a single linearly polarized Gaussian beam propagating through a stratified m…
Tunable Optical Torque by Asymmetry-Induced Spin-Hall Effect in Tightly Focused Spinless Gaussian Beams
Sauvik Roy, Ram Nandan Kumar, Biswajit Das +3
A linearly polarized Gaussian beam, carrying zero net spin angular momentum, is conventionally not expected to exert optical torque or induce rotational motion in birefringent micr…
Photophoretic Trapping: Fundamentals, Advances and Future Directions
Anita Pahi, Kirty Ranjan Sahoo, Souvik Sil +1
Photophoretic forces, several orders of magnitude stronger than radiation pressure, enable particle trapping at remarkably low optical intensities and have opened pathways to appli…
A stochastic heat engine driven using a nonlinear protocol
Amrutayani Panda, Biswajit Das, Shuvojit Paul +2
A colloidal particle confined in a time-dependent optical trap can function as a microscopic heat engine, with optimization strategies playing a crucial role in enhancing its perfo…
Unravelling the Flow of Information in a Nonequilibrium Process in the Presence of Hydrodynamic Interactions
Biswajit Das, Sreekanth K Manikandan, Ayan Banerjee
Identifying the origin of nonequilibrium characteristics in a generic interacting system having multiple degrees of freedom is a challenging task. In this context, information theo…
Simultaneous active and diffusive behaviour of asymmetric microclusters in a photophoretic trap
Anita Pahi, Kirty Ranjan Sahoo, Biswajit Das +2
Active and diffusive motion in Brownian particles are regularly observed in fluidic environments, albeit at different time scales. Here, we experimentally study the dynamics of hig…
Decoding active force fluctuations from spatial trajectories of active systems
Anisha Majhi, Biswajit Das, Subhadeep Gupta +4
Mesoscopic active systems exhibit various unique behaviours - absent in passive systems - due to the forces generated by the corresponding constituents by converting their availabl…
A comprehensive study of the Spin-Hall effect of tightly focused linearly polarized light through a stratified medium in optical tweezers
Sramana Das, Sauvik Roy, Subhasish Dutta Gupta +2
The optical Spin-Hall effect originates from the interaction between the spin angular momentum (SAM) and extrinsic orbital angular momentum (OAM) of light, leading to mutual interr…
A study of the coupled dynamics of asymmetric absorbing clusters in a photophoretic trap
Anita Pahi, Shuvojit paul, Ayan Banerjee
We report a study on the dynamics of absorbing asymmetric carbon clusters trapped by a loosely focused Gaussian beam using photophoretic force. At high laser powers, all the trappe…