Author:
Rossetti Andrea,Deckert Thomas,Hu Huatian,Venanzi Tommaso,Bousseksou Adel,De Luca Federico,Giliberti Valeria,Colombelli Raffaele,Ciracì Cristian,Ortolani Michele,Brida Daniele
Abstract
We investigate the third-order nonlinear optical response of highly-doped semiconductor nanoantennas in the mid-IR spectral region at different wavelengths and doping levels. Theory and experiment identify free electrons as the main source of nonlinearity.