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Finite-size effect on one-dimensional coupled-resonator optical waveguides
Yong-Hong Ye1, J Ding, D-Y Jeong
1Center for Nanoscale Science and Department of Electrical Engineering, The Pennsylvania State University,University Park, Pennsylvania 16802, USA.
Summary
Finite-size coupled-resonator optical waveguides (CROWs) exhibit oscillations in dispersion and group velocity. Matching the surrounding medium
Area of Science:
- Photonics
- Optical Waveguides
- Condensed Matter Physics
Background:
- Coupled-resonator optical waveguides (CROWs) are key components in integrated photonics.
- Finite-size effects can significantly alter the performance of optical waveguide structures.
- Understanding these effects is crucial for designing efficient optical devices.
Purpose of the Study:
- To investigate the impact of finite size on CROWs.
- To analyze dispersion relation, group velocity, and transmission characteristics.
- To explore methods for mitigating finite-size induced oscillations.
Main Methods:
- Theoretical analysis of one-dimensional finite-size CROWs.
- Investigating dispersion relation and group velocity.
- Utilizing Thelen's method for admittance matching.
- Analyzing structure parameters for bandwidth and group velocity control.
Main Results:
- Finite-size CROWs show oscillatory behavior in dispersion and group velocity compared to infinite structures.
- Admittance matching of the surrounding medium suppresses these oscillations.
- Thelen's method effectively identifies matching layer parameters.
- Structure parameters influencing bandwidth and group velocity were analyzed.
Conclusions:
- Finite-size effects in CROWs lead to performance deviations.
- Admittance matching is a viable strategy to improve CROW performance.
- The study provides insights into optimizing CROW design for specific applications.