370 citations · 991 across the 6 of their papers we have counts for
6 papers
Observation of coherent perfect absorption at an exceptional point
Changqing Wang, William R. Sweeney, A. Douglas Stone +1
The past few years have witnessed growing interests in exceptional points (EPs) in various domains, including photonics, acoustics and electronics. However, EPs have mainly been re…
Electromagnetic Eigenvalue Problems and Nonhermitian Effects in Linear and Saturable Scattering
William R. Sweeney
In this thesis we address a series of new problems in non-hermitian optical scattering with increasing degrees of complexity. We develop the theory of reflectionless scattering mod…
Reflectionless excitation of arbitrary photonic structures: A general theory
A. Douglas Stone, William R. Sweeney, Chia Wei Hsu +2
We outline a recently developed theory of impedance-matching, or reflectionless excitation of arbitrary finite photonic structures in any dimension. It describes the necessary and…
Theory of reflectionless scattering modes
William R. Sweeney, Chia Wei Hsu, A. Douglas Stone
We develop the theory of a special type of scattering state in which a set of asymptotic channels are chosen as inputs and the complementary set as outputs, and there is zero refle…
Perfectly absorbing exceptional points and chiral absorbers
William R. Sweeney, Chia Wei Hsu, Stefan Rotter +1
We identify a new kind of physically realizable exceptional point (EP) corresponding to degenerate coherent perfect absorption, in which two purely incoming solutions of the wave o…
Quantum Noise Theory of Exceptional Point Sensors
Mengzhen Zhang, William Sweeney, Chia Wei Hsu +3
Distinct from closed quantum systems, non-Hermitian system can have exceptional points (EPs) where both eigenvalues and eigenvectors coalesce. Recently, it has been proposed and de…