Wavelength Selective Nanophotonic Components Utilizing Channel Plasmon Polaritons

Abstract

We fabricate and investigate wavelength selective components utilizing channel plasmon polaritons (CPPs) and operate at telecom wavelengths: a waveguide-ring resonator-based add-drop multiplexer (WRR-ADM) and a compact (3.75-μm-long) Bragg grating filter (BGF). The CPP waveguides represent 0.5-μm-wide and 1.3-μm-deep V-grooves in gold, which are combined with a 5-μm-radius ring resonator (in the WRR-ADM) or 0.5-μm-long wells milled with the period of 0.75 μm across a groove (in the BGF). The CPP-based components are characterized in the wavelength range of 1425−1600 nm by use of near-field optical microscopy, exhibiting the wavelength selectivity of ∼40 nm.