Skirting terahertz waves in a photo-excited nanoslit structure
Articles > Article · 2014
Authors: Mostafa SHALABY, Justyna Fabianska, Marco PECCIANTI, Yavuz ÖZTÜRK, Francois VIDAL, Hans SIGG, Roberto MORANDOTTI, Thomas Feurer
APPLIED PHYSICS LETTERS, Journal Indexed in SCI Expanded, International, 2014, vol 104
DOI: 10.1063/1.4871305
Summary
Terahertz fields can be dramatically enhanced as they propagate through nanometer-sized slits. The enhancement is mediated by a significant accumulation of the induced surface charges on the surrounding metal. This enhancement is shown here to be dynamically modulated while the nanoslits are gradually shunted using a copropagating optical beam. The terahertz fields are found to skirt the nanoscale photo-excited region underneath the slits, scattering to the far field and rigorously mapping the near field. (C) 2014 AIP Publishing LLC.