3 papers
physics.optics2026
Topology-optimized distributed 3d anisotropic Raman emission
Ian M. Hammond, Pengning Chao, Henry O. Everitt +4
Topology optimization (TO) of 3D surface-enhanced Raman scattering (SERS) substrates faces challenges in managing field singularities and modeling orientation-averaged anisotropic…
physics.optics2025
Unifying and accelerating level-set and density-based topology optimization by subpixel-smoothed projection
Alec M. Hammond, Ardavan Oskooi, Ian M. Hammond +3
We introduce a new "subpixel-smoothed projection" (SSP) formulation for differentiable binarization in topology optimization (TopOpt) as a drop-in replacement for previous projecti…
physics.optics2025
Sum-of-Squares Bounds on Surface-Enhanced Raman Scattering
Pengning Chao, Ian M. Hammond, Steven G. Johnson
Surface-enhanced Raman scattering (SERS) is a critical tool for chemical sensing and spectroscopy, and a key question is how to optimally design nanostructures for maximizing SERS.…