Abstract
In the field of non-Hermitian photonics it is a well-established concept that a time-reversed laser acts as a “coherent perfect absorber” (CPA). However, CPAs are usually limited to a single, judiciously shaped wavefront (‘mode’). Here, we demonstrate how this limitation can be overcome by time-reversing a “degenerate cavity laser”, based on a cavity that self-images any incident light-field onto itself. Placing a weak, critically-coupled absorber into this cavity, ensures that any incoming wavefront is absorbed with close to perfect efficiency.
| Original language | English |
|---|---|
| Pages (from-to) | 636-637 |
| 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 |
All Science Journal Classification (ASJC) codes
- Electrical and Electronic Engineering
- Materials Science (miscellaneous)
- Electronic, Optical and Magnetic Materials
- Materials Chemistry