One-dimensional photonic crystal fishbone hybrid nanocavity with nanoposts

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We propose and investigate a one-dimensional photonic crystal (PhC) fishbone (FB) hybrid nanocavity lying on silver substrate with a horizontal air slot. With very few PhC periods, the confined transverse-magnetic, TM 10 hybrid mode concentrated within the air slot shows high quality factor over effective mode volume ratio larger than 10 5 λ -3 . Most importantly, this FB hybrid nanocavity allows formation of low-index nanoposts within the air slot without significantly affecting the mode properties. These nanoposts guarantee the structural stabilities under different environmental perturbations. Furthermore, capabilities of our proposed design in serving as optical sensors and tweezers for bio-sized nanoparticles are also investigated.

Original languageEnglish
Article number191107
JournalApplied Physics Letters
Issue number19
StatePublished - 12 May 2014

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