Strong electric field enhancement in a gold/silica bow-tie nano-antenna

Evgeny G. Mironov; Abdul Khaleque; Fardad Azarmi

doi:10.1117/12.2269381

18 April 2017 Strong electric field enhancement in a gold/silica bow-tie nano-antenna

Evgeny G. Mironov, Abdul Khaleque, Fardad Azarmi

Proceedings Volume 10252, Optical Manipulation Conference; 1025217 (2017) https://doi.org/10.1117/12.2269381
Event: SPIE Technologies and Applications of Structured Light, 2017, Yokohama, Japan

Abstract

Bow-tie nano-antennas are the kind of plasmonic structures that are widely used in optical applications to obtain strong electric fields in a limited volume. Their capability to enhance the incident light can be greatly improved by constructing these structures from several alternating metal/dielectric layers. Following this approach, we introduce and then analyze the performance of a multilayered Au/SiO₂ bow-tie nano-antenna in the finite-difference time-domain software. We show that the gold/silica thickness ratio of 50% leads to the improvement of the electric field enhancement on almost 50%, when compared to a monolithic gold device, which makes the proposed design attractive for various sensing applications.

Citation Download Citation

Evgeny G. Mironov, Abdul Khaleque, and Fardad Azarmi "Strong electric field enhancement in a gold/silica bow-tie nano-antenna", Proc. SPIE 10252, Optical Manipulation Conference, 1025217 (18 April 2017); https://doi.org/10.1117/12.2269381

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