Abstract

We analyze and design a hybrid dielectric-loaded plasmonic waveguide (HDLW) featuring a long propagation length and strong field confinement, for efficient control and confinement of light in the subwavelength area of λ2/160. The HDLW is then used to build compact wavelength selective components of high optical performance, including ring resonators (RR) and add-drop filters (ADF). In particular, we demonstrate RRs having a small ring radius of 2μm, a low transmission loss of 0.8dB, a high extinction ratio of 21dB, and a free spectral range of 66nm. Moreover, an ADF with a ring radius of 2μm features a 12dB extinction ratio, a transmission loss of 0.9dB, and a channel isolation level of 10dB at the resonant wavelength. The compact footprint and superior performance of these plasmonic components make them promising building blocks for future nanoscale electronic-photonic integrated circuits for data communication and sensing applications.

© 2011 Optical Society of America

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