Mode selecting plays a vital role in the field of optoelectronics, such as optical communication, signal processing, on-chip light manipulation, mode conversion, and frequency synthesis. In this work, flexible selection and enhancement of the frequency modes in an unidirectional coupled Su–Schrieffer–Heeger (SSH) frequency lattice are obtained with Floquet exceptional points (EPs) and chiral Zener tunneling (ZT). The unidirectional coupled non-Hermitian SSH frequency lattices are synthesized by a double-ring system with complex dynamical modulations. Under an effective direct current (dc) force induced by the phase-mismatching of the modulations, the two Floquet bands of the non-Hermitian frequency lattices are degenerated and the Floquet EPs arise. Therefore, the unidirectional and irreversible frequency mode conversion takes place, which is the chiral ZT. Moreover, through perturbation analysis and numerical simulations, we prove that the frequency modes of the two-band system can be selected and enhanced by a multi-photon resonance dc force.
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Selection and enhancement of the frequency modes with Floquet exceptional points and chiral Zener tunneling
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4 March 2024
Research Article|
March 06 2024
Selection and enhancement of the frequency modes with Floquet exceptional points and chiral Zener tunneling
Special Collection:
Topological and Chiral Matter – Physics and Applications
Yuelan Chen;
Yuelan Chen
(Data curation, Formal analysis, Investigation)
1
Department of Physics, Wenzhou University
, Wenzhou, Zhejiang 325035, China
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Penghao Zhang;
Penghao Zhang
(Data curation, Formal analysis, Investigation)
1
Department of Physics, Wenzhou University
, Wenzhou, Zhejiang 325035, China
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Chao Hong;
Chao Hong
(Formal analysis, Investigation)
1
Department of Physics, Wenzhou University
, Wenzhou, Zhejiang 325035, China
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Yiling Song
;
Yiling Song
a)
(Conceptualization, Data curation, Formal analysis, Funding acquisition, Investigation, Methodology, Project administration, Resources, Software, Supervision, Validation, Visualization, Writing – original draft, Writing – review & editing)
1
Department of Physics, Wenzhou University
, Wenzhou, Zhejiang 325035, China
a)Authors to whom correspondence should be addressed: [email protected] and [email protected]. URL: http://www.Second.institution.edu/
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Shaolin Ke
;
Shaolin Ke
(Conceptualization, Funding acquisition)
2
Hubei Key Laboratory of Optical Information and Pattern Recognition, Wuhan Institute of Technology
, Wuhan 430205, China
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Mingfeng Wang
;
Mingfeng Wang
(Project administration)
1
Department of Physics, Wenzhou University
, Wenzhou, Zhejiang 325035, China
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Weiwei Liu
;
Weiwei Liu
a)
(Conceptualization, Formal analysis, Investigation, Methodology, Writing – review & editing)
3
School of Physics and Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology
, Wuhan 430074, China
a)Authors to whom correspondence should be addressed: [email protected] and [email protected]. URL: http://www.Second.institution.edu/
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Peixiang Lu
Peixiang Lu
(Resources, Supervision)
2
Hubei Key Laboratory of Optical Information and Pattern Recognition, Wuhan Institute of Technology
, Wuhan 430205, China
3
School of Physics and Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology
, Wuhan 430074, China
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a)Authors to whom correspondence should be addressed: [email protected] and [email protected]. URL: http://www.Second.institution.edu/
Appl. Phys. Lett. 124, 101111 (2024)
Article history
Received:
December 21 2023
Accepted:
February 23 2024
Citation
Yuelan Chen, Penghao Zhang, Chao Hong, Yiling Song, Shaolin Ke, Mingfeng Wang, Weiwei Liu, Peixiang Lu; Selection and enhancement of the frequency modes with Floquet exceptional points and chiral Zener tunneling. Appl. Phys. Lett. 4 March 2024; 124 (10): 101111. https://doi.org/10.1063/5.0193233
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