The differential dispersion relation for the and modes (TM-like and TE-like, respectively) in planar photonic crystals is used to control the polarization-dependent propagation of light. - and -polarized beams were separated by 10° after propagating through a -long planar photonic crystal in the wavelength range from 1250 to 1300 nm. The plane-wave expansion calculation matches well with the experimental results. This result represents the first demonstration, to our knowledge, of a polarization splitter realized in a planar photonic crystal configuration in the near-infrared wavelength range operating solely in transmission mode.
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