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- Publisher Website: 10.1038/s41377-024-01409-1
- Scopus: eid_2-s2.0-85187133979
- PMID: 38438358
- WOS: WOS:001178123300001
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Article: Chiral transmission by an open evolution trajectory in a non-Hermitian system
Title | Chiral transmission by an open evolution trajectory in a non-Hermitian system |
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Authors | |
Issue Date | 5-Mar-2024 |
Publisher | Springer Nature |
Citation | Light: Science and Applications, 2024, v. 13, n. 1, p. 1-9 How to Cite? |
Abstract | Exceptional points (EPs), at which two or more eigenvalues and eigenstates of a resonant system coalesce, are associated with non-Hermitian Hamiltonians with gain and/or loss elements. Dynamic encircling of EPs has received significant interest in recent years, as it has been shown to lead to highly nontrivial phenomena, such as chiral transmission in which the final state of the system depends on the encircling handedness. Previously, chiral transmission for a pair of eigenmodes has been realized by establishing a closed dynamical trajectory in parity-time- (PT-) or anti-PT-symmetric systems. Although chiral transmission of symmetry-broken modes, more accessible in practical photonic integrated circuits, has been realized by establishing a closed trajectory encircling EPs in anti-PT-symmetric systems, the demonstrated transmission efficiency is very low due to path-dependent losses. Here, we demonstrate chiral dynamics in a coupled waveguide system that does not require a closed trajectory. Specifically, we explore an open trajectory linking two infinite points having the same asymptotic eigenmodes (not modes in PT- and anti-PT-symmetric systems), demonstrating that this platform enables high-efficiency chiral transmission, with each eigenmode localized in a single waveguide. This concept is experimentally implemented in a coupled silicon waveguide system at telecommunication wavelengths. Our work provides a new evolution strategy for chiral dynamics with superior performance, laying the foundation for the development of practical chiral-transmission devices.We explore an open trajectory linking two infinite points having the same asymptotic eigenmodes, demonstrating that this platform enables high-efficiency chiral transmission, with each eigenmode localized in a single waveguide. |
Persistent Identifier | http://hdl.handle.net/10722/342095 |
ISSN | 2023 Impact Factor: 20.6 |
ISI Accession Number ID |
DC Field | Value | Language |
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dc.contributor.author | Shu, XQ | - |
dc.contributor.author | Zhong, Q | - |
dc.contributor.author | Hong, K | - |
dc.contributor.author | You, OB | - |
dc.contributor.author | Wang, J | - |
dc.contributor.author | Hu, GW | - |
dc.contributor.author | Alu, A | - |
dc.contributor.author | Zhang, S | - |
dc.contributor.author | Christodoulides, DN | - |
dc.contributor.author | Chen, L | - |
dc.date.accessioned | 2024-04-02T08:25:31Z | - |
dc.date.available | 2024-04-02T08:25:31Z | - |
dc.date.issued | 2024-03-05 | - |
dc.identifier.citation | Light: Science and Applications, 2024, v. 13, n. 1, p. 1-9 | - |
dc.identifier.issn | 2095-5545 | - |
dc.identifier.uri | http://hdl.handle.net/10722/342095 | - |
dc.description.abstract | Exceptional points (EPs), at which two or more eigenvalues and eigenstates of a resonant system coalesce, are associated with non-Hermitian Hamiltonians with gain and/or loss elements. Dynamic encircling of EPs has received significant interest in recent years, as it has been shown to lead to highly nontrivial phenomena, such as chiral transmission in which the final state of the system depends on the encircling handedness. Previously, chiral transmission for a pair of eigenmodes has been realized by establishing a closed dynamical trajectory in parity-time- (PT-) or anti-PT-symmetric systems. Although chiral transmission of symmetry-broken modes, more accessible in practical photonic integrated circuits, has been realized by establishing a closed trajectory encircling EPs in anti-PT-symmetric systems, the demonstrated transmission efficiency is very low due to path-dependent losses. Here, we demonstrate chiral dynamics in a coupled waveguide system that does not require a closed trajectory. Specifically, we explore an open trajectory linking two infinite points having the same asymptotic eigenmodes (not modes in PT- and anti-PT-symmetric systems), demonstrating that this platform enables high-efficiency chiral transmission, with each eigenmode localized in a single waveguide. This concept is experimentally implemented in a coupled silicon waveguide system at telecommunication wavelengths. Our work provides a new evolution strategy for chiral dynamics with superior performance, laying the foundation for the development of practical chiral-transmission devices.We explore an open trajectory linking two infinite points having the same asymptotic eigenmodes, demonstrating that this platform enables high-efficiency chiral transmission, with each eigenmode localized in a single waveguide. | - |
dc.language | eng | - |
dc.publisher | Springer Nature | - |
dc.relation.ispartof | Light: Science and Applications | - |
dc.rights | This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License. | - |
dc.title | Chiral transmission by an open evolution trajectory in a non-Hermitian system | - |
dc.type | Article | - |
dc.identifier.doi | 10.1038/s41377-024-01409-1 | - |
dc.identifier.pmid | 38438358 | - |
dc.identifier.scopus | eid_2-s2.0-85187133979 | - |
dc.identifier.volume | 13 | - |
dc.identifier.issue | 1 | - |
dc.identifier.spage | 1 | - |
dc.identifier.epage | 9 | - |
dc.identifier.eissn | 2047-7538 | - |
dc.identifier.isi | WOS:001178123300001 | - |
dc.publisher.place | LONDON | - |
dc.identifier.issnl | 2047-7538 | - |