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Manipulating optical polarization by stereo plasmonic structure
1National Laboratory of Solid State Microstructures, Nanjing University, Nanjing, China.
Optics Express
|January 26, 2011
Summary
This study introduces a stereo nanoholes array in metallic film for optical polarization control. The plasmonic structure achieves enhanced transmission and precise 90° optical rotation with tailored design.
Area of Science:
- Plasmonics
- Optical Physics
- Nanotechnology
Background:
- Metallic nanostructures exhibit unique optical properties.
- Controlling light polarization is crucial for optical devices.
Purpose of the Study:
- To theoretically investigate a stereo nanoholes array in metallic film.
- To explore its capabilities in manipulating optical polarization at optical frequencies.
Main Methods:
- Theoretical study of a specific plasmonic structure.
- Utilizing structural design for polarization control.
- Development of an analytical Coupled Mode Method (CMM) with frequency-dependent coupling.
Main Results:
- Demonstration of precise control over linear polarization states.
- Achieved complete 90° optical rotation in transmission.
- Enhanced transmission efficiency alongside polarization manipulation.
- Modulation of surface plasmon propagation.
Conclusions:
- The stereo nanoholes array offers remarkable optical polarization manipulation.
- The developed CMM effectively describes the optical rotation property in these systems.
