Polymer Resonant Waveguide Gratings
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CitationSaleem, Muhammad Rizwan. Ali, Rizwan. (2018). Polymer Resonant Waveguide Gratings. Emerging Waveguide Technology, 277-294. 10.5772/intechopen.76917.
This chapter deals with the advances in polymeric waveguide gratings for iltering and integrated optics applications. Optical polymer materials are widely used for planar and corrugated micro-optical waveguide grating structures ranging from down a micrometer to several hundred micrometers. Light in a polymeric waveguide is transmited in discrete modes whose propagation orders depend on incident wavelength, waveguide dimensional parameters, and material properties. Difracted optical structures are permittivity-modulated microstructures whose micro-relief surface proiles exhibit global/local periodicity. The resonant nature and location of such globally periodic structures (difraction gratings) excite leaky waveguide modes which couple incident light into relected/transmited plane wave difraction orders. It describes design & analysis, fabrication, and characterization of sub-wavelength polymer grating structures replicated in diferent polymeric materials (polycarbonate, cyclic olein copolymer, Ormocomp) by a simple, cost-efective, accurate, and large scale production method. The master stamp (mold) for polymer replication is fabricated with an etchless process with smooth surface proile.