Rotter, S. (2024, December 13). Coherent perfect absorption and transmission of light [Conference Presentation]. 21st Christmas Symposium of Physicists of the University of Maribor, Maribor, Slovenia. http://hdl.handle.net/20.500.12708/206571
21st Christmas Symposium of Physicists of the University of Maribor
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Event date:
12-Dec-2024 - 14-Dec-2024
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Event place:
Maribor, Slovenia
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Keywords:
Coherent Perfect Absorption; Wave Transmission; disordered media
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Research facilities:
Vienna Scientific Cluster
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Project title:
Wellenkontrolle in Systemen mit Absorption und Unordnung: P 32300-N27 (FWF - Österr. Wissenschaftsfonds)
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Additional information:
In my talk I will present two recent works focused on the perfect absorption and transmission of waves through interferometric cancellation of backscattering. In the rst case [1,2], we demonstrate that even a weakly absorbing lm can be turned into a coherent perfect absorber by building a degenerate cavity around it. This special cavity perfectly couples incoming light elds with arbitrary wavefronts into the absorber even for the case that light is a dynamically varying speckle pattern. In the second case [3], we demonstrate how to construct an anti-re ection structure for a complex scattering system like a disordered medium. Similar to an anti-re ection coating for conventional eye-glasses, this structure leads to perfect transmission across the scattering system by suppressing back-scattering for any incoming wavefront. If time permits, I will also say a few words about the topological origin of the above e ects and how this aspect can be used to engineer thermal radiation [4].
