High efficiency of graded index photonic crystal as an input coupler

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Cakmak A. O., ÇOLAK İ., Caglayan H., KURT H., ÖZBAY E.

JOURNAL OF APPLIED PHYSICS, cilt.105, sa.10, 2009 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 105 Sayı: 10
  • Basım Tarihi: 2009
  • Doi Numarası: 10.1063/1.3130403
  • Dergi Adı: JOURNAL OF APPLIED PHYSICS
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Anahtar Kelimeler: finite difference time-domain analysis, gradient index optics, optical couplers, optical materials, photonic crystals, WAVE-GUIDES, SELF-COLLIMATION, TAPER
  • Ankara Üniversitesi Adresli: Hayır

Özet

A graded index photonic crystal (GRIN PC) configuration was placed at the input side of a photonic crystal waveguide (PCW) in order to efficiently couple the light waves into the waveguide. We compared the transmission efficiencies of light in the absence and presence of the GRIN PC structure. We report a significant improvement in coupling when the GRIN PC is incorporated with the PCW. The intensity profiles were obtained by carrying out the experiments at microwave frequencies. Finite difference time domain based simulations were found to be in good agreement with our experimental results.