15 citations · 23 across the 15 of their papers we have counts for
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Exotic light dynamics around a fourth order exceptional point
Sibnath Dey, Arnab Laha, Somnath Ghosh
The physics of exceptional point (EP) singularities, has been a key to a wide range of unique physical applications in open systems. In this context, the mutual interactions among…
Photonic Crystal Based Ultra-Sensitive Interferometric Sensor with Spatial Resolution up to 1 nm
Snehashis Sadhukhan, Arnab Laha, Abhijit Biswas +1
We report a very high precision interferometric sensor with resolution up to ~λ/1024, exploiting hollow photonic bandgap waveguide-based geometry for the first time. Here sensing h…
Nonadiabatic Modal Dynamics Around a Third-order Exceptional Point in a planar waveguide
Sibnath Dey, Arnab Laha, Somnath Ghosh
Dynamical parametric encirclement around an Exceptional Point (EP) and corresponding asymmetric state transfer phenomenon have attracted considerable attention recently. In this co…
Third-order Exceptional Point and Successive Switching among Three States in a Degenerate Optical Microcavity
Arnab Laha, Dinesh Beniwal, Sibnath Dey +2
One of the most intriguing topological features of open systems is exhibiting exceptional point (EP) singularities. Apart from the widely explored second-order EPs (EP2s), the expl…
Ultra-sensitive Light Confinement Driven by Multiple Bound States in the Continuum
Harsh K. Gandhi, Arnab Laha, Somnath Ghosh
We propose a unique framework to study the topological properties of an optical bound state in the continuum(BIC). We employ the interactions between proximity resonances undergoin…