Tailoring exceptional points in a hybrid PT-symmetric and anti-PT-symmetric scattering system
| Autor: | Zhi-Cheng Xiao, Andrea Alù |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Physics
non-hermitian Condensed matter physics Exceptional point Scattering QC1-999 Nanophotonics 02 engineering and technology 021001 nanoscience & nanotechnology 01 natural sciences pt symmetry Atomic and Molecular Physics and Optics Electronic Optical and Magnetic Materials circuits 0103 physical sciences nanophotonics Electrical and Electronic Engineering 010306 general physics 0210 nano-technology Biotechnology |
| Zdroj: | Nanophotonics, Vol 10, Iss 14, Pp 3723-3733 (2021) |
| ISSN: | 2192-8614 |
| Popis: | Fano resonances feature an asymmetric lineshape with controllable linewidth, stemming from the interplay between bright and dark resonances. They provide efficient opportunities to shape the scattering lineshape, but they usually lack flexibility and tunability and are hindered by loss in passive systems. Here, we explore a hybrid parity-time (PT) and anti-parity-time (APT) symmetric system supporting unitary scattering features with highly tunable Fano resonances. The PT-APT-symmetric system can be envisioned in nanophotonic and microwave circuit implementations, allowing for real-time control of the scattering lineshape and its underlying singularities. Our study shows the opportunities enabled by non-Hermitian platforms to control scattering lineshapes for a plethora of photonic, electronic, and quantum systems, with potential for high-resolution imaging, switching, sensing, and multiplexing. |
| Databáze: | OpenAIRE |
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