A Coherent Perfect Absorber for Arbitrary Wavefronts

Y. Slobodkin; G. Weinberg; H. Horner; K. Pichler; S. Rotter; O. Katz

A Coherent Perfect Absorber for Arbitrary Wavefronts

Y. Slobodkin, G. Weinberg, H. Horner, K. Pichler, S. Rotter^*, O. Katz^*

^*Corresponding author for this work

Department of Applied Physics

Research output: Contribution to journal › Conference article › peer-review

Abstract

The concept of a 'coherent perfect absorber' (CPA) as a time-reversed laser is well-known in the domain of non-Hermitian photonics. However, conventional CPAs are usually limited to perfectly absorbing only a single, carefully shaped wavefront (mode'). Apart from the correctly matched input wavefront, all of the possibly many other modes are only weakly absorbed. We have now overcome this limitation by creating a 'massively degenerate coherent perfect absorber' (MAD-CPA) that can absorb any complex input field with near-perfect efficiency.

Original language	English
Pages (from-to)	1159-1160
Number of pages	2
Journal	International Conference on Metamaterials, Photonic Crystals and Plasmonics
State	Published - 2023
Event	13th International Conference on Metamaterials, Photonic Crystals and Plasmonics, META 2023 - Paris, France Duration: 18 Jul 2023 → 21 Jul 2023

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© 2023, META Conference. All rights reserved.

Cite this

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AU - Weinberg, G.

AU - Horner, H.

AU - Pichler, K.

AU - Rotter, S.

AU - Katz, O.

PY - 2023

Y1 - 2023

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AB - The concept of a 'coherent perfect absorber' (CPA) as a time-reversed laser is well-known in the domain of non-Hermitian photonics. However, conventional CPAs are usually limited to perfectly absorbing only a single, carefully shaped wavefront (mode'). Apart from the correctly matched input wavefront, all of the possibly many other modes are only weakly absorbed. We have now overcome this limitation by creating a 'massively degenerate coherent perfect absorber' (MAD-CPA) that can absorb any complex input field with near-perfect efficiency.

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T2 - 13th International Conference on Metamaterials, Photonic Crystals and Plasmonics, META 2023

Y2 - 18 July 2023 through 21 July 2023

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A Coherent Perfect Absorber for Arbitrary Wavefronts

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