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physics.optics2026
High-Performance Photonic Crystal Biosensors using Sub-wavelength Nanopillars
Zhengzheng Zhai, Sajeev John
Photonic-crystal (PC) slabs composed of subwavelength silicon pillars erected on a thin silicon backing layer, with heights of only one or half lattice constant, are simulated for…
physics.optics2025
High-Sensitivity Photonic Crystal Biosensors using Topological Light Trapping
Zhengzheng Zhai, Sajeev John
Photonic crystals (PCs) with localized optical cavity modes arising from topological domain-wall line defects are simulated for optical biosensing by numerical solution of Maxwell'…
physics.optics2024
Bessel-beam direct-write of the etch-mask in a nano-film of alumina for high-efficiency Si solar cells
Tomas Katkus, Soon Hock Ng, Haoran Mu +14
Large surface area applications such as high-efficiency > 26% solar cells require surface patterning with 1-10 micrometers periodic patterns at high fidelity over 1-10 cm^2 areas (…