ArticleAdvanced science (Weinheim, Baden-Wurttemberg, Germany)2023
Transient Loss-Induced Non-Hermitian Degeneracies for Ultrafast Terahertz Metadevices.
Article in Advanced science (Weinheim, Baden-Wurttemberg, Germany), 2023. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 4 papers.
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Who cites it
4 citing papers in PubMed, 15 citations in OpenAlex.
- Terahertz MEMS actuators and applications.Microsystems & nanoengineering · 2026Review
- Terahertz Metamaterials Inspired by Quantum Phenomena.Research (Washington, D.C.) · 2025Review
- Creating Anti-Chiral Exceptional Points in Non-Hermitian Metasurfaces for Efficient Terahertz Switching.Advanced science (Weinheim, Baden-Wurttemberg, Germany) · 2024Article
- Transient Loss-Induced Non-Hermitian Degeneracies for Ultrafast Terahertz Metadevices.Advanced science (Weinheim, Baden-Wurttemberg, Germany) · 2023Article
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Authors and funding
8 authors at 1 institution in 1 country.
Funding
Abstract
Non-Hermitian degeneracies, also known as exceptional points (EPs), have attracted considerable attention due to their unique physical properties. In particular, metasurfaces related to EPs can open the way to unprecedented devices with functionalities such as unidirectional transmission and ultra-sensitive sensing. Herein, an active non-Hermitian metasurface with a loss-induced parity-time symmetry phase transition for ultrafast terahertz metadevices is demonstrated. Specifically, the eigenvalues of the non-Hermitian transmission matrix undergo a phase transition under optical excitation and are degenerate at EPs in parameter space, which is accompanied by the collapse of chiral transmission. Ultrafast EP modulation on a picosecond time scale can be realized through variations in the transient loss at a non-Hermitian metasurface pumped by pulsed excitation. Furthermore, by exploiting the physical characteristics of chiral transmission EPs, a switchable quarter-wave plate based on the photoactive metasurface is designed and experimentally verified and realized the corresponding function of polarization manipulation. This work opens promising possibilities for designing functional terahertz metadevices and fuses EP physics with active metasurfaces.
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