We designed a compact wavelength-splitter using self-collimated diffraction in two-dimensional polymeric photonic crystal (PhC). In a three-dimensional finite difference time-domain (3-D FDTD) simulation, the beams of two different wavelengths (1043-nm and 1550-nm) are separated at an angle of 15 degrees in the PhC region. And, we fabricated this device using ultra-violet (UV) embossing technique that can be simply performed at room temperature with a silicon mold. We expect that this design concept and low-cost mass production method of a PhC-based device enable us to realize a very high-density integrated circuits due to its simple fabrication process and compact size.
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