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The effect of nonlinear exposure on the characteristics of photonic crystal fabricated by holography is investigated theoretically and experimentally. A kind of materials with low refractive index (n=152) is used to fabricate diamond structure. By controlling the exposure in strong nonlinear range, the property of photonic bandgap is improved. Also,some proposals are made to achieve complete band gaps by materials with low refractive index.
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Keywords:
- photonic crystal /
- holography /
- non-linear exposure
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