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Electrically generated unidirectional surface plasmon source

  • L. Wang*
  • , T. Li
  • , L. Li
  • , W. Xia
  • , X. G. Xu
  • , S. N. Zhu
  • *Corresponding author for this work
  • Nanjing University
  • Shandong University

Research output: Contribution to journal › Article › peer-review

Abstract

We experimentally demonstrated an electrically excited surface plasmon source, which was fulfilled in a silver coated light emitting diode (LED) with well designed gratings. With a DC current supply, surface plasmon polariton (SPP) waves were generated directly from the illuminations of the LED via the grating coupler. By adjusting the grating to a tilted one, a unidirectional SPP beam was successfully attained with a high extinction ratio (ER∼10) and an improved launching efficiency. Detailed analyses show that this electrically generated unidirectional SPP has a considerable long propagation distance (∼14μm), allowing for further manipulations in plasmonic integrations and sensors.

Original languageEnglish
Pages (from-to)8710-8717
Number of pages8
JournalOptics Express
Volume20
Issue number8
DOIs
StatePublished - 9 Apr 2012
Externally publishedYes

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