343 citations · 1.4k across the 38 of their papers we have counts for
5 papers · 1 filter
Quasinormal coupled-mode analysis of dynamic gain in exceptional-point lasers
Hao He, Xingwei Gao, Alexander Cerjan +1
One of the key features of lasers operating near exceptional points (EPs) is that the gain medium can support an oscillating population inversion above a pump threshold, leading to…
Tutorial: Classifying Photonic Topology Using the Spectral Localizer and Numerical -Theory
Alexander Cerjan, Terry A. Loring
Recently, the spectral localizer framework has emerged as an efficient approach to classifying topology in photonic systems featuring local nonlinearities and radiative environment…
Quantitative measure of topological protection in Floquet systems through the spectral localizer
Stephan Wong, Alexander Cerjan, Justin T. Cole
The standard understanding of topological protection from band theory is that a system's topology cannot change without first closing the bulk band gap. However, in Floquet systems…
Multivariable pseudospectrum in -algebras
Alexander Cerjan, Vasile Lauric, Terry A. Loring
We look at various forms of spectrum and associated pseudospectrum that can be defined for noncommuting -tuples of Hermitian elements of a -algebra. The emphasis is on theo…
Classifying topology in photonic crystal slabs with radiative environments
Stephan Wong, Terry A. Loring, Alexander Cerjan
In the recent years, photonic Chern materials have attracted substantial interest as they feature topological edge states that are robust against disorder, promising to realize def…