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A recently elaborated novel class of spiral-architecture photonic crystals, which has promising photonic bandgap properties, is realized by direct laser writing in SU-8 (see Figure). Such self-supporting structures show signatures of photonic stopgaps at infrared wavelengths, and can serve as accurate templates for infiltration of higher-refractive-index materials.
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Seet et al. (2005) studied this question.
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