8 papers
Probing the Broken Spatial Symmetry of a Stratified Medium with Structured Light
Arani Maiti, Sauvik Roy, Nirmalya Ghosh +2
We study near-symmetric resonant stratified media to show how a tiny broken spatial symmetry can effectively be probed by structured light with or without orbital angular momentum.…
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…
Surface Plasmon Mediated Giant Goos-Hanchen and Imbert-Fedorov Shifts on a Corrugated Metal Surface
Arani Maiti, Sauvik Roy, Abhi Mondal +3
Enhanced beam shifts mediated by surface plasmon resonance (SPR) at metal-dielectric interfaces have been widely investigated. However, research on the associated Imbert-Fedorov or…
Spin-Split Dispersion of Leaky Surface plasmons in Inversion- Symmetric System
Sujit Rajak, Nishkarsh Kumar, Dheeraj Yadav +6
Spin-dependent dispersion and Rashba effect are manifestations of universal spin orbit interaction associated with the breaking of the spatial inversion symmetry in condensed matte…
Can a vector beam be critically coupled leading to perfect absorption?
Sauvik Roy, Nirmalya Ghosh, Ayan Banerjee +1
Critical coupling has emerged as a prominent area of research in recent years. However, most theoretical models are based on scalar theories (and occasionally coupled mode theories…
Quasi-coherent perfect absorption of counter-propagating vector beams of finite spatial extent through an absorptive slab
Sauvik Roy, Nirmalya Ghosh, Ayan Banerjee +1
Coherent perfect absorption (CPA) has been a topic of considerable contemporary research interest. Most of the theoretical treatment of CPA with beams, to the best of our knowledge…