Unidirectional and bidirectional coupling of surface plasmons based on a nonperiodic nano slit array

Aparna Udupi, Mruthyunjaya Somasekhara Handigod, Sathish Madhava Kumar

Research output: Contribution to journalArticle


A 2D structure is proposed, made up of nano slits to couple free space mode of any given wave front to a propagating Surface Plasmon Polariton (SPP) mode of Metal Insulator Metal (MIM) waveguide. The structure can be designed to act as either a unidirectional or bidirectional coupler. Designed structures are simulated using an FEM technique and results for circular and plane wave fronts are demonstrated. From the results obtained, it is observed that there is an optimum aperture size for coupling maximum power into the MIM waveguide for the case of a circular wave front.

Original languageEnglish
Pages (from-to)17-19
Number of pages3
JournalPhotonics Letters of Poland
Issue number1
Publication statusPublished - 01-01-2018


All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials

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