<div class="csl-bib-body">
<div class="csl-entry">Rotter, S. (2025). <i>Coherent perfect absorption, transmission and emission of light</i> [Presentation]. Physik-Kolloquium der Universität Bonn, Bonn, Germany.</div>
</div>
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dc.identifier.uri
http://hdl.handle.net/20.500.12708/212624
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dc.description.abstract
In my talk I will present three recent works focused on the perfect absorption, transmission and emission of radiation by interferometric wave engineering. In the first case, we demonstrate that even a weakly absorbing film can be turned into a “coherent perfect absorber” by building a degenerate cavity around it [1]. This special cavity perfectly couples incoming light fields with arbitrary wavefronts into the absorber – even for the case that light is a dynamically varying speckle pattern. In the second case, we demonstrate how to construct an anti-reflection structure for a complex scattering system like a disordered medium [2]. Similar to an anti-reflection coating for conventional eye-glasses, this structure leads to perfect transmission across a strongly scattering system by perfectly suppressing any back-scattering. As it turns out, these effects have a topological origin, which can be used to engineer topologically protected thermal radiation [3].
[1] Y. Slobodkin, G. Weinberg, H. Hörner, K. Pichler, S. Rotter, and O. Katz, Science 377, 995 (2022)
[2] M. Horodynski, M. Kühmayer, C. Ferise, S. Rotter, and M. Davy, Nature 607, 281 (2022)
[3] M. S. Ergoktas, A. Kecebas, K. Despotelis, S. Soleymani, G. Bakan, A. Kocabas, A. Principi, S. Rotter, S. K. Özdemir, and C. Kocabas, Science 384, 1122 (2024)
en
dc.description.sponsorship
FWF - Österr. Wissenschaftsfonds
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dc.language.iso
en
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dc.subject
Wave scattering
en
dc.subject
Coherent perfect absorption
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dc.title
Coherent perfect absorption, transmission and emission of light
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dc.type
Presentation
en
dc.type
Vortrag
de
dc.relation.grantno
P 32300-N27
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dc.type.category
Presentation
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tuw.publication.invited
invited
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tuw.project.title
Wellenkontrolle in Systemen mit Absorption und Unordnung
