Hörner, H., Wild, L., Slobodkin, Y., Weinberg, G., Katz, O., & Rotter, S. (2024, July 31). Coherent Perfect Absorption of Arbitrary Wavefronts at an Exceptional Point [Poster Presentation]. Complex Nanophotonics Science Camp, London, United Kingdom of Great Britain and Northern Ireland (the). http://hdl.handle.net/20.500.12708/199805
London, United Kingdom of Great Britain and Northern Ireland (the)
-
Keywords:
Physics; Optics; Coherent Perfect Absorption
en
Abstract:
A Coherent Perfect Absorber (CPA) exploits the interferometric nature of light to deposit all of a light field’s incident energy into an otherwise weakly absorbing sample. The downside of this concept is that the necessary destructive interference in CPAs gets easily destroyed both by spectrally or spatially detuning the incoming light field. Each of these two limitations has recently been overcome by insights from exceptional-point physics and by using a degenerate cavity, respectively. In our poster, we show how these two concepts can be combined into a new type of cavity design, which allows broadband exceptional-point absorption of arbitrary wavefronts. We present two possible implementations of such a Massively Degenerate Exceptional-Point absorber and present analytical results and numerical simulations.