Publications [#331954] of Henry Everitt

Papers Published

1. Karl, N; Heimbeck, MS; Everitt, HO; Chen, HT; Taylor, AJ; Brener, I; Benz, A; Reno, JL; Mendis, R; Mittleman, DM, Characterization of an active metasurface using terahertz ellipsometry, Applied Physics Letters, vol. 111 no. 19 (November, 2017), pp. 191101-191101, AIP Publishing [doi]
   (last updated on 2025/11/07)

   Abstract:
   Switchable metasurfaces fabricated on a doped epi-layer have become an important platform for developing techniques to control terahertz (THz) radiation, as a DC bias can modulate the transmission characteristics of the metasurface. To model and understand this performance in new device configurations accurately, a quantitative understanding of the bias-dependent surface characteristics is required. We perform THz variable angle spectroscopic ellipsometry on a switchable metasurface as a function of DC bias. By comparing these data with numerical simulations, we extract a model for the response of the metasurface at any bias value. Using this model, we predict a giant bias-induced phase modulation in a guided wave configuration. These predictions are in qualitative agreement with our measurements, offering a route to efficient modulation of THz signals.