Silicon nitride waveguide integrated with cross bowtie nanoplasmonic antenna for tunable dipole plasmon resonance and maximum local field enhancement

Sen-Yin Ling; Zai-Chen Zhang; Peng Chen; Hui Zhang; Xu-Tao Yu

doi:10.1117/1.OE.57.11.117108

15 November 2018 Silicon nitride waveguide integrated with cross bowtie nanoplasmonic antenna for tunable dipole plasmon resonance and maximum local field enhancement

Sen-Yin Ling, Zai-Chen Zhang, Peng Chen, Hui Zhang, Xu-Tao Yu

Author Affiliations +

Optical Engineering, Vol. 57, Issue 11, 117108 (November 2018). https://doi.org/10.1117/1.OE.57.11.117108

Abstract

A single transverse electric mode silicon nitride strip waveguide functionalized with cross bowtie nanoplasmonic antenna is investigated, and then its tunable dipole plasmon resonance and maximum local field enhancement are numerically analyzed. The cross bowtie antenna is composed of a horizontal bowtie parallel to the propagation and a vertical bowtie parallel to the electric field. We demonstrate that the dipole plasmon resonance wavelength of localized surface plasmon resonance of cross bowtie antenna can be tuned by the horizontal bowtie, specifically by the edge length of its regular triangular nanoprisms, and the dipole plasmon resonance wavelength is independent of the horizontal gap. We also show that the maximum local field enhancement of cross bowtie antenna can be tuned by the vertical bowtie, specifically by the edge length of its regular triangular nanoprisms. The tunable dipole plasmon resonance and maximum local field enhancement of integrated cross bowtie nanoplasmonic antenna can practically be applied for on-chip sensing applications.

Citation Download Citation

Sen-Yin Ling, Zai-Chen Zhang, Peng Chen, Hui Zhang, and Xu-Tao Yu "Silicon nitride waveguide integrated with cross bowtie nanoplasmonic antenna for tunable dipole plasmon resonance and maximum local field enhancement," Optical Engineering 57(11), 117108 (15 November 2018). https://doi.org/10.1117/1.OE.57.11.117108

Received: 17 May 2018; Accepted: 29 October 2018; Published: 15 November 2018

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KEYWORDS

Antennas

Waveguides

Plasmons

Nanoplasmonic antennas

Silicon

Resonance enhancement

Nanoparticles

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