107 citations · 181 across the 9 of their papers we have counts for
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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…
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…
Exceptional Point and Toward Mode Selective Optical Isolation
Arnab Laha, Sibnath Dey, Harsh K. Gandhi +2
Dynamical encirclement of an Exceptional Point (EP) and corresponding time-asymmetric mode evolution properties due to breakdown in adiabatic theorem have been a key to range of ex…
Optical waveguide hosting multiple exceptional points: Toward selective mode conversion
Arnab Laha, Harsh K. Gandhi, Sibnath Dey +3
We investigate the astonishing physical aspects of Exceptional Points (EPs) in a 1D planar few-mode optical waveguide. The waveguide hosts four quasi-guided modes. Here interaction…
Non-adiabatic Modal Dynamics around Exceptional Points in an All-Lossy Dual-Mode Optical Waveguide: Towards Chirality Driven Asymmetric Mode-Conversion
Arnab Laha, Abhijit Biswas, Somnath Ghosh
We report a 1D planar optical waveguide with transverse distribution of inhomogeneous loss profile, which exhibits an exceptional point (EP). The waveguide hosts two leaky resonant…
All-Lossy Quasi-Guided Dual-Mode Optical Waveguide Exhibiting Exceptional Singularities
Arnab Laha, Abhijit Biswas, Somnath Ghosh
We explore exceptional points (EP) in a dual-mode symmetric planar optical waveguide with transverse variation of inhomogeneous loss profile; where modal evolution alongside an EP…