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Design, Fabrication, and Experimental Characterization of Plasmonic Photoconductive Terahertz Emitters
Published on: July 8, 2013
Radiation-suppressed plasmonic open resonators designed by nonmagnetic transformation optics
Hongyi Xu1, Xingjue Wang, Tianyuan Yu
1Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University, 21 Nanyang Link, Singapore 637371, Singapore.
Scientific Reports
|November 9, 2012
Summary
Researchers designed open polygonal resonators using transformation optics to confine surface plasmon polaritons (SPPs) with minimal loss. This breakthrough enables enhanced light-matter interaction for advanced plasmonic devices.
Area of Science:
- Plasmonic Optics
- Nanophotonics
- Metamaterials
Background:
- Confining light energy with surface plasmon polaritons (SPPs) while minimizing radiation loss is crucial in plasmonic optics.
- Maximizing light-matter interaction in open structures presents a significant challenge.
Purpose of the Study:
- To propose a novel design method for creating polygonal surface-plasmonic resonators in fully open structures.
- To suppress radiation loss in SPPs while maintaining a large interaction area.
Main Methods:
- Utilizing transformation optics, specifically a nonmagnetic affine transformation strategy.
- Designing open structures that guide SPPs as if they were on a flat interface, thereby reducing radiation.
Main Results:
- Demonstrated a design method for polygonal plasmonic resonators in open structures.
- Achieved suppression of radiation loss by manipulating SPP propagation using transformation optics.
- The nonmagnetic nature allows implementation with naturally available dielectric materials.
Conclusions:
- The proposed design offers a method to create efficient open plasmonic resonators.
- This approach minimizes radiation loss and enhances light-matter interaction.
- Potential applications include omnidirectional sensing, light harvesting, energy storage, and plasmonic lasing.
