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Singular properties generated by finite periodic PT-symmetric optical waveguide network
Optics Express
|January 31, 2019
Summary
This study explores one-dimensional finite periodic parity-time (PT) symmetric networks, revealing criteria for PT-symmetry breaking and conditions for ultrastrong transmission and transparency. The research highlights potential for designing novel optical structures with unique functionalities.
Area of Science:
- Physics
- Photonics
- Materials Science
Background:
- Parity-time (PT) symmetry offers unique properties in optical systems.
- Finite periodic structures are crucial for developing advanced optical devices.
Purpose of the Study:
- Investigate the characteristics of one-dimensional finite periodic PT-symmetric networks.
- Derive criteria for PT-symmetry breaking and transparency.
- Explore applications in optical device design.
Main Methods:
- Transfer matrix method for analytical derivation.
- Analysis of scattering matrix elements.
- Investigation of transmission and reflection coefficients.
Main Results:
- New criteria for PT-symmetry breaking transition.
- Exceptional points depend on cell structure, not cell number.
- Conditions for ultrastrong transmission derived.
- Unidirectional and bidirectional transparency achieved.
- Unidirectionally invisible structures identified at exceptional points.
Conclusions:
- Finite periodic PT-symmetric networks exhibit tunable properties.
- The findings enable the design of novel optical structures and networks.
- Potential applications in advanced optical functionalities.
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