Two cases of progressive light-matter interaction by plasmonics: A super plasmonic probe and an optimized nanoantenna

In this talk, I will present two of our progressive research: a super plasmonic probe [1] and an optimized nanoantenna [2]. First, we demonstrate a plasmonic near-field scanning optical probe that supports a radial symmetric surface plasmon polaritons (SPP) excitation and a Fabry-Perot resonance [1]. We experimentally indicate an optical resolution of 10 nm, a topographic resolution of 10 nm, an outstanding throughput of 3.28 %, and an exceptional SNR up to 18.2 (near-free background), as shown in Fig.1. Second, we design a plasmonic nanoantenna, integrated into atomically thin transition metal dichalcogenides (TMDC) to gain insight into nanoscale light-matter interactions [2]. As shown in Fig.2, we introduce unusual quadrupole gap plasmons (QGPs) in the tailored nanoantennas. The optimized QGP structure performance enhanced by a factor of 27.87 and beneficial continuous bilayer MoS2 can be applied in the hydrogen evolution reaction (HER) with superior outcomes [2].