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Published August 2014 | public
Book Section - Chapter

3D Nanofocusing plasmonic waveguide

Choo, Hyuck ORCID icon

Abstract

We have demonstrated experimentally a highly efficient on-chip three-dimensional (3D) linearly tapered metal-insulator-metal (MIM) nanoplasmonic photon compressor (3D NPC) with a final aperture size of 14 x 80 nm^2. An optimized and linearly tapered MIM gap plasmon waveguide could theoretically reduce the excessive losses that would occur during nanofocusing processes. In simulation study, this approach could enable nanofocusing into a 2 x 5 nm^2 area with the coupling loss and maximum E2 enhancement of 2.5 dB and 3.0 × 10^4, respectively. We fabricated the 3D NPC on a chip employing electron beam-induced deposition and demonstrated its highly localized light confinement using a two-photon photoluminescence (TPPL) technique. From the TPPL measurements, we experimentally estimated an intensity enhancement of 400 within a 14 x 80 nm^2 cross-sectional area and a coupling efficiency of -1.3 dB (or 74% transmittance).

Additional Information

© IEEE 2014. This work was funded by the DARPA, the Powell Foundation, and the EAS Division of Caltech. The author thanks all the collaborators involved in this project.

Additional details

Created:
August 20, 2023
Modified:
October 23, 2023