7 papers · 1 filter
van der Waals Crystal Anisotropy Controls Dual-Channel Refractive Index Sensing in a TiO/-MoO Nanobar Metasurface
Shoumik Debnath, Sudipta Saha
Filling the gap of a TiO nanobar-pair metasurface with -MoO, a biaxial orthorhombic crystal, produces two high- Fano resonances with asymmetric quality factors: $Q_{\…
Polarization-Selective Near-Perfect Absorption via Mie-Type Resonance in van der Waals Anisotropic ReS/-MoO/Au Heterostructure
Shoumik Debnath, Sudipta Saha
We investigate polarization-selective absorption in a visible-wavelength heterostructure consisting of a ReS stripe grating, an -MoO spacer, and an Au back-reflector usi…
Polarization-Multiplexed Spatial Differentiation and Filtering Driven by van der Waals Birefringence
Shoumik Debnath, Sudipta Saha
We report that the biaxial birefringence of -MoO can activate two spectrally distinct quasi-bound states in the continuum (quasi-BICs) within a single symmetric TiO nano…
Single-Device VOC Fingerprinting via Polarization-Selective Anisotropic BeS-Clad Silicon Microring Resonator
Sudipta Saha, Shoumik Debnath, Md Kawsar Alam
A silicon microring resonator with an anisotropic beryllium sulfide (BeS) cladding is proposed for polarization-selective detection of exhaled-breath volatile organic compound biom…
Inverse Design Validated Optimization of Lead-Free CsCuCl 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…
Composition-Dependent Plasmon-Enhanced Emission in Lead-Free CsCuX Halides: A DFT--FDTD Study
Shoumik Debnath, Sudipta Saha, Khondokar Zahin +2
Lead-free CsCuX (X = Cl, Br, I) halides exhibit high photoluminescence quantum yields and excellent ambient stability, yet light-emitting devices based on these materia…