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Resonant Fully dielectric metasurfaces for ultrafast Terahertz pulse generation by Peters, Luke; Rocco, Davide; Olivieri, Luana; Leon, Unai Arregui; Cecconi, Vittorio; Carletti, Luca; Gigli, Carlo; Della Valle, Giuseppe; Cutrona, Antonio; Gongora, Juan Sebastian Totero; Leo, Giuseppe; Pasquazi, Alessia; De Angelis, Costantino; Peccianti, Marco is a scholarly article available to read on EtoBox.

What is Resonant Fully dielectric metasurfaces for ultrafast Terahertz pulse generation about?

Metasurfaces represent a new frontier in materials science paving for unprecedented methods of controlling electromagnetic waves, with a range of applications spanning from sensing to imaging and communications. For pulsed terahertz generation, metasurfaces offer a gateway to tuneable thin emitters that can be utilised for large-area imaging, microscopy and spectroscopy. In literature THz-emitting metasurfaces generally exhibit high absorption, being based either on metals or on semiconductors excited in highly resonant regimes. Here we propose the use of a fully dielectric semiconductor exploiting morphology-mediated resonances and inherent quadratic nonlinear response. Our system exhibits a remarkable 40-fold efficiency enhancement compared to the unpatterned at the peak of the optimised wavelength range, demonstrating its potential as scalable emitter design.

Author

Peters, Luke; Rocco, Davide; Olivieri, Luana; Leon, Unai Arregui; Cecconi, Vittorio; Carletti, Luca; Gigli, Carlo; Della Valle, Giuseppe; Cutrona, Antonio; Gongora, Juan Sebastian Totero; Leo, Giuseppe; Pasquazi, Alessia; De Angelis, Costantino; Peccianti, Marco

Published

2024

Language

EN