108 citations · 210 across the 9 of their papers we have counts for
9 papers
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…
Modeling lasers and saturable absorbers via multilevel atomic media in the Meep FDTD software: Theory and implementation
Alexander Cerjan, Ardavan Oskooi, Song-Liang Chua +1
This technical note describes the physical model, numerical implementation, and validation of multilevel atomic media for lasers and saturable absorbers in Meep: a free/open-source…
Factorized Machine Learning for Performance Modeling of Massively Parallel Heterogeneous Physical Simulations
Ardavan Oskooi, Christopher Hogan, Alec M. Hammond +2
We demonstrate neural-network runtime prediction for complex, many-parameter, massively parallel, heterogeneous-physics simulations running on cloud-based MPI clusters. Because ind…
Experimental Demonstration of Quasi-Resonant Absorption in Silicon Thin Films for Enhanced Solar Light Trapping
Ardavan Oskooi, Menaka De Zoysa, Kenji Ishizaki +1
We experimentally demonstrate that the addition of partial lattice disorder to a thin-film micro-crystalline silicon photonic crystal results in the controlled spectral broadening…
Tandem Photonic-Crystal Thin Films Surpassing Lambertian Light-Trapping Limit over Broad Bandwidth and Angular Range
Ardavan Oskooi, Yoshinori Tanaka, Susumu Noda
Random surface texturing of an optically-thick film to increase the path length of scattered light rays, first proposed nearly thirty years ago, has thus far remained the most effe…
Electromagnetic Wave Source Conditions
Ardavan Oskooi, Steven G. Johnson
This chapter discusses the relationships between current sources and the resulting electromagnetic waves in FDTD simulations. First, the "total-field/scattered-field" approach to c…
Partially-disordered photonic-crystal thin films for enhanced and robust photovoltaics
Ardavan Oskooi, Pedro A. Favuzzi, Yoshinori Tanaka +3
We present a general framework for the design of thin-film photovoltaics based on a partially-disordered photonic crystal that has both enhanced absorption for light trapping and r…
General scaling limitations of ground-plane and isolated-object cloaks
Hila Hashemi, A. Oskooi, J. D. Joannopoulos +1
We prove that, for arbitrary three-dimensional transformation-based invisibility cloaking of an object above a ground plane or of isolated object, there are practical constraints t…
A novel boundary element method using surface conductive absorbers for full-wave analysis of 3-D nanophotonics
Lei Zhang, Jung Hoon Lee, Ardavan Oskooi +3
Fast surface integral equation (SIE) solvers seem to be ideal approaches for simulating 3-D nanophotonic devices, as these devices generate fields both in an interior channel and i…