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Published on: July 21, 2018
Comparative study of directional couplers utilizing long-range surface plasmon polaritons
Triranjita Srivastava1, Arun Kumar
1Department of Physics, Indian Institute of Technology Delhi, Hauz Khas,New Delhi Pin-110016, India. triranjita@yahoo.co.in
Applied Optics
|April 23, 2010
Summary
This study compares lateral and vertical directional couplers using long-range surface plasmon polaritons (LRSPPs). Optimal metal stripe thickness minimizes coupling length for efficient LRSPP directional coupler design.
Area of Science:
- Plasmonics
- Nanophotonics
- Optical Devices
Background:
- Directional couplers are fundamental optical components.
- Long-range surface plasmon polaritons (LRSPPs) offer unique light confinement properties.
- Investigating LRSPP-based couplers is crucial for next-generation photonic integrated circuits.
Purpose of the Study:
- To conduct a comparative theoretical investigation of lateral and vertical directional couplers.
- To analyze the influence of key parameters on coupler characteristics.
- To identify design guidelines for efficient LRSPP directional couplers.
Main Methods:
- Theoretical analysis of coupling characteristics.
- Utilizing long-range surface plasmon polaritons (LRSPPs).
- Parametric study including metal stripe thickness, width, separation, and operating wavelength.
Main Results:
- Detailed analysis of coupling behavior for both lateral and vertical configurations.
- Identification of an optimal metal stripe thickness for minimum coupling length.
- Demonstration of parameter dependencies on coupler performance.
Conclusions:
- The study provides insights into the comparative performance of lateral and vertical LRSPP directional couplers.
- Optimal design parameters, particularly metal stripe thickness, are crucial for efficient coupling.
- Findings will aid in the development of advanced photonic devices.
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