Novel surface plasmon waveguide for high integration

Abstract

A novel surface plasmon waveguide structure is proposed for highly integrated planar lightwave circuits. By etching a small trench through a metallic thin film on a silica substrate, a guided mode with highly confined light fields is realized. The mode properties of the proposed structure are studied. The necessity of using a polymer upper-cladding is discussed. The coupling between two closely positioned waveguides and a 90o bending are also studied numerically. Sharp bending and high integration can be realized with the present surface plasmon waveguide. The proposed structure is easy to fabricate as compared with some other types of surface plasmon waveguides for high integration.

Adiabatic and nonadiabatic nanofocusing of plasmons by tapered gap plasmon waveguides

“…Recently there has been significant interest in using gap plasmon waveguides for subwavelength nano-optical applications with subwavelength localization provided in one dimension 20,21 or even both [22][23][24] dimensions normal to the direction of propagation. Therefore, in this letter, we conduct rigorous numerical analysis of nanofocusing of plasmons in tapered gap waveguides in both the adiabatic and nonadiabatic regimes and determine the optimum conditions for maximally effective focusing with the strongest local field enhancement.…”

Two-dimensionally localized modes of a nanoscale gap plasmon waveguide

“…Since the submission of this manuscript a paper that numerically treats a similar problem was published [24]. 7 …”

Modeling of all-optical even and odd parity generator circuits using metal-insulator-metal plasmonic waveguides

“…In designing of building blocks for future generation of integrated optical components and devices, plasmonic waveguides play a significant role. Recently, several types of waveguides were discovered such as slots [5,6], plasmonic wedge waveguide [7], and dielectric ridge on the metal surface [8], but among all these waveguides the metal-insulator-metal (MIM) waveguide is generally preferred due to its their exceptional property of confining the surface plasmons to a deep subwavelength scale [9][10][11][12][13]. In these waveguides, propagation is achieved by using even modes due to their low-loss confinement profile.…”