Launching of surface plasmon polaritons with tunable directions and intensity ratios by phase control of dual fundamental Gaussian beams
| Autor: | Shu Chun Chu, Chun Fu Kuo |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Physics
Range (particle radiation) business.industry Gaussian Surface plasmon Mode (statistics) Physics::Optics 02 engineering and technology 021001 nanoscience & nanotechnology 01 natural sciences Surface plasmon polariton Atomic and Molecular Physics and Optics Dual (category theory) symbols.namesake Optics 0103 physical sciences symbols 010306 general physics 0210 nano-technology business Plasmon Excitation |
| Zdroj: | Optics express. 25(9) |
| ISSN: | 1094-4087 |
| Popis: | This study proposes a method to achieve excitation of surface plasmon polaritons (SPPs) with tunable directions and intensity ratios on a designed two thin slit structure by the phase control of dual fundamental Gaussian beams. Simply modulating the phase difference between two incident fundamental Gaussian beams (i.e. TEMsub0,0/submode laser beam) controls the propagating direction of the resulting SPP wave between two opposite linear directions and also the value of the intensity ratio between propagating SPP waves in two opposite directions. The proposed method achieves a wide dynamic SPP intensity ratio adjusting range from -20 dB to 20 dB. This easy method of changing the direction of SPPs makes the dynamic control of the direction of SPP waves practicable, which shows great potential in plasmonic applications. |
| Databáze: | OpenAIRE |
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