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The position-dependent mode couplings between a semiconductor nanowire(NW) and a planar photonic crystal(PPC) nanocavity are studied. By scanning an NW across a PPC nanocavity along the hexagonal lattice's Γ– M and M – K directions, the variations of resonant wavelengths, quality factors, and mode volumes in both fundamental and second-order resonant modes are calculated, implying optimal configurations for strong mode-NW couplings and light-NW interactions. For the fundamental(second-order) resonant mode, scanning an NW along the M – K(Γ– M) direction is preferred, which supports stronger light-NW interactions with larger NW-position tolerances and higher quality factors simultaneously. The simulation results are confirmed experimentally with good agreements. 相似文献
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