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      Grating based plasmonic band gap cavities

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      Author
      Şenlik, S. Seçkin
      Kocabaş, Aşkın
      Aydınlı, Atilla
      Date
      2009-08
      Source Title
      Optics Express
      Electronic ISSN
      1094-4087
      Publisher
      Optical Society of American (OSA)
      Volume
      17
      Issue
      18
      Pages
      15541 - 15549
      Language
      English
      Type
      Article
      Item Usage Stats
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      Abstract
      We report on a comparative study of grating based plasmonic band gap cavities. Numerically, we calculate the quality factors of the cavities based on three types of grating surfaces; uniform, biharmonic and Moiré surfaces. We show that for biharmonic band gap cavities, the radiation loss can be suppressed by removing the additional grating component in the cavity region. Due to the gradual change of the surface profile in the cavity region, Moiré type surfaces support cavity modes with higher quality factors. Experimentally, we demonstrate the existence of plasmonic cavities based on uniform gratings. Effective index perturbation and cavity geometries are obtained by additional dielectric loading. Quality factor of 85 is obtained from the measured band structure of the cavity. © 2009 Optical Society of America.
      Keywords
      Bandpass filters
      Energy gap
      Plasmons
      Band gaps
      Bi-harmonic
      Cavity geometry
      Cavity mode
      Cavity regions
      Comparative studies
      Dielectric loadings
      Effective index
      Gradual changes
      Grating components
      Grating surface
      Quality factors
      Radiation loss
      Surface profiles
      Q factor measurement
      Permalink
      http://hdl.handle.net/11693/22648
      Published Version (Please cite this version)
      http://dx.doi.org/10.1364/OE.17.015541
      Collections
      • Advanced Research Laboratories (ARL) 34
      • Department of Physics 2299
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