Polarization-independent beam splitting by a photonic crystal right prism

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Yücel M. B., Cicek A., Uluğ B.

APPLIED PHYSICS B-LASERS AND OPTICS, cilt.113, sa.1, ss.107-114, 2013 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 113 Sayı: 1
  • Basım Tarihi: 2013
  • Doi Numarası: 10.1007/s00340-013-5445-y
  • Dergi Adı: APPLIED PHYSICS B-LASERS AND OPTICS
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED)
  • Sayfa Sayıları: ss.107-114
  • Akdeniz Üniversitesi Adresli: Evet

Özet

Splitting of light waves by a two-dimensional photonic crystal associated with source size and dispersion relation of photonic crystal at a wavelength of 1,550 nm without disturbing periodicity is numerically demonstrated via finite-difference time-domain simulations. Split branches in either polarization state make plus or minus 45A degrees with the [11] direction and propagate in a self-collimated manner with equal amplitude and phase. Sixty-four percent of total transmittance is attained provided that the waves are coupled and collected through appropriate planar waveguides. Alternatively, approximately 50 % total transmittance for both polarizations can be obtained by application of an anti-reflection coating layer at the input face. Polarization-independent beam splitting occurs in a narrow range around the target wavelength, while its transverse-magnetically polarized sub-harmonic can also be split. The photonic crystal can also operate as a polarizing splitter at oblique incidence.