Launching of surface plasmon polaritons with tunable directions and intensity ratios by phase control of dual fundamental Gaussian beams

Chun Fu Kuo, Shu Chun Chu

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

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. TEM0, 0 mode 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.

Original languageEnglish
Pages (from-to)10456-10463
Number of pages8
JournalOptics Express
Volume25
Issue number9
DOIs
Publication statusPublished - 2017 May 1

All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics

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