Fig. 1: Scaling law of plasmonic near-field characteristic toward the skin-depth regime.
From: Hybrid Dirac semimetal-based photodetector with efficient low-energy photon harvesting
a Schematics of the bow-tie antenna-assisted device. b, c The cross-section view of the simulated electric field intensity normalized to incident one marks the power-gain around the nanochannel at 0.3 THz electromagnetic waves. Localized oscillating electric field enhancement in the sub-100 nm channel by light-induced current charges. d The profile of electric field distribution along the x-axis. e, f The scaling of electric field enhancement derived from FDTD method versus channel length and incident frequency. g The spatial distribution of the electric field near the 100 nm gapped channel substantiates the strong focusing induced by the oscillating charge
