A Coherent Perfect Absorber for Arbitrary Wavefronts

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

Research output: Contribution to journalConference articlepeer-review


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 languageAmerican English
Pages (from-to)1159-1160
Number of pages2
JournalInternational Conference on Metamaterials, Photonic Crystals and Plasmonics
StatePublished - 2023
Event13th International Conference on Metamaterials, Photonic Crystals and Plasmonics, META 2023 - Paris, France
Duration: 18 Jul 202321 Jul 2023

All Science Journal Classification (ASJC) codes

  • Electrical and Electronic Engineering
  • Materials Science (miscellaneous)
  • Electronic, Optical and Magnetic Materials
  • Materials Chemistry


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