31 citations · 64 across the 6 of their papers we have counts for
6 papers
Fast Evaluation of the Azimuthal Fourier Modes of the 3D Helmholtz Green's Function and Their Derivatives
Hanwen Zhang
We introduce an algorithm for evaluating the azimuthal Fourier modes , , of the three-dimensional Helmholtz Green's function with real wavenumber…
Fullwave design of cm-scale cylindrical metasurfaces via fast direct solvers
Wenjin Xue, Hanwen Zhang, Abinand Gopal +2
Large-scale metasurfaces promise nanophotonic performance improvements to macroscopic optics functionality, for applications from imaging to analog computing. Yet the size scale mi…
Finding roots of complex analytic functions via generalized colleague matrices
Hanwen Zhang, Vladimir Rokhlin
We present a scheme for finding all roots of an analytic function in a square domain in the complex plane. The scheme can be viewed as a generalization of the classical approach to…
Conservation-law-based global bounds to quantum optimal control
Hanwen Zhang, Zeyu Kuang, Shruti Puri +1
Active control of quantum systems enables diverse applications ranging from quantum computation to manipulation of molecular processes. Maximum speeds and related bounds have been…
Quasinormal Coupled Mode Theory
Hanwen Zhang, Owen D. Miller
Coupled mode theory (CMT) is a powerful framework for decomposing interactions between electromagnetic waves and scattering bodies into resonances and their couplings with power-ca…
Scattering concentration bounds: Brightness theorems for waves
Hanwen Zhang, Chia Wei Hsu, Owen D. Miller
The brightness theorem---brightness is nonincreasing in passive systems---is a foundational conservation law, with applications ranging from photovoltaics to displays, yet it is re…