Abstract
Abstract In this work, we studied theoretically the induction of electromagnetic forces in three-dimensional photonic crystals when light impinges normally onto an assembly of SiO\(_2\) nanospheres known as artificial opals. We investigated the electromagnetic propagation along a high symmetry direction of the crystal, specifically along the [111] crystal axis and the scalar wavelength approximation is used. The studied photonic structure consists of a microcavity-like structure formed of two opals, separated by a variable air gap, and the working wavelength is 630 nm. We show that the radiation pressure can be as high as \(3\times 10^{-5}\, {\text {N}}/{\text {m}}^2\) and electromagnetic force value of 0.1 nN when the laser optical power is 13 mW with beam size of \(3\,{\text {mm}}^2\).KeywordsLight propagationElectromagnetic forceOpalGap
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