10 dB emission suppression in a structured low index medium

Significant suppression of radiation in3Dstructured media with small refractive indices of 1.4-1.6, such as glass or polymers, is a desirable feature yet to be obtained.We present here quasiperiodic3Dstructures with a homogeneous distribution ofBragg peaks on a sphere in reciprocal space obtained by an overlap of multiple gratings. Simulations on 3D structures revealed a limitation of emission suppression contrasting from theoretical predictions. The effect of number of gratings and refractive index contrast on the obtained suppression is investigated.We demonstrate an almost refractive index independent-10 dB suppression of emission for a refractive index as low as 1.30.

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DDC Class

600: Technology