Shoumik Debnath

collaborators

4 papers

physics.optics2026

van der Waals Crystal Anisotropy Controls Dual-Channel Refractive Index Sensing in a TiO $_{2}$ / $α$ -MoO $_{3}$ Nanobar Metasurface

Shoumik Debnath, Sudipta Saha

Filling the gap of a TiO $_{2}$ nanobar-pair metasurface with $α$ -MoO $_{3}$ , a biaxial orthorhombic crystal, produces two high- $Q$ Fano resonances with asymmetric quality factors: $Q_{\…

physics.optics2026

Polarization-Selective Near-Perfect Absorption via Mie-Type Resonance in van der Waals Anisotropic ReS $_{2}$ / $α$ -MoO $_{3}$ /Au Heterostructure

Shoumik Debnath, Sudipta Saha

We investigate polarization-selective absorption in a visible-wavelength heterostructure consisting of a ReS $_{2}$ stripe grating, an $α$ -MoO $_{3}$ spacer, and an Au back-reflector usi…

physics.optics2026

Polarization-Multiplexed Spatial Differentiation and Filtering Driven by van der Waals Birefringence

Shoumik Debnath, Sudipta Saha

We report that the biaxial birefringence of $α$ -MoO $_{3}$ can activate two spectrally distinct quasi-bound states in the continuum (quasi-BICs) within a single symmetric TiO $_{2}$ nano…

physics.optics2026

Inverse Design Validated Optimization of Lead-Free Cs $_{3}$ Cu $_{2}$ Cl $_{5}$ Visible-Light Microring Resonators Using a Coupled DFT-FDTD Framework

Shoumik Debnath, Sudipta Saha

Microring resonators (MRRs) are indispensable for wavelength filtering, sensing, and on-chip signal routing in photonic integrated circuits, yet visible-wavelength implementations…

van der Waals Crystal Anisotropy Controls Dual-Channel Refractive Index Sensing in a TiO2​/α-MoO3​ Nanobar Metasurface

Polarization-Selective Near-Perfect Absorption via Mie-Type Resonance in van der Waals Anisotropic ReS2​/α-MoO3​/Au Heterostructure

Polarization-Multiplexed Spatial Differentiation and Filtering Driven by van der Waals Birefringence

Inverse Design Validated Optimization of Lead-Free Cs3​Cu2​Cl5​ Visible-Light Microring Resonators Using a Coupled DFT-FDTD Framework

van der Waals Crystal Anisotropy Controls Dual-Channel Refractive Index Sensing in a TiO $_{2}$ / $α$ -MoO $_{3}$ Nanobar Metasurface

Polarization-Selective Near-Perfect Absorption via Mie-Type Resonance in van der Waals Anisotropic ReS $_{2}$ / $α$ -MoO $_{3}$ /Au Heterostructure

Inverse Design Validated Optimization of Lead-Free Cs $_{3}$ Cu $_{2}$ Cl $_{5}$ Visible-Light Microring Resonators Using a Coupled DFT-FDTD Framework