Figure 4: Mode mapping of a linear h-BN antenna of 1,220 nm in length.
From: Nanoimaging of resonating hyperbolic polaritons in linear boron nitride antennas
(a) Experimental s-SNOM images recorded at frequencies marked by black squares in d. Scale bar, 0.4 μm. (b) Simulated s-SNOM images. Green arrows in a,b indicate the position of the near-field maxima along the transverse direction. (c) AFM topography image of the antenna. Scale bar, 0.4 μm. (d) Nano-FTIR spectrum recorded at the position marked by the blue dot in c. The white background colour indicates the reststrahlen band. The height of the antenna measured in the AFM was 65 nm, and the average width obtained from the AFM topography was 250 nm.
