Abstract

We propose a photonic crystal (PhC) nanofishbone (NFB) nanocavity, which confines an ultrahigh $Q$ ($\sim 1.8\times {10}^7$) transverse-magnetic (TM) mode. With thin slab thickness and only few PhC periods, the TM mode in NFB nanocavity shows higher $Q$, larger confinement factor and smaller mode volume than that in PhC nanobeam nanocavity, while the total etched-surface area is also significantly reduced. This PhC NFB nanocavity with very compact device size will be very beneficial for quantum cascade lasers, plasmonic nanolasers, and other applications needing high $Q$ TM modes.

© 2013 Optical Society of America

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