Nowadays, photoemitted electrons are widely used for time-resolved electron microscopy and diffraction, enabling ultrafast time resolution at the atomic scale. Here, we benefit from the large field enhancement offered by vertical gold nanocones resonating at 1 THz, to induce THz field-driven electron emission and acceleration. The nanocones are fabricated via an advanced 3D printing technology based on two-photon lithography on a polymer and successively gold coated. The THz response of the nanocones is characterized. A reasonably stable THz field-driven electron current is directly measured and the kinetic energy spectrum of the electrons is estimated via an analytical two-step model.

Author(s): Andrea Rovere, Institut National de la Recherche Scientifique (Canada); Andrea Bertoncini, King Abdullah Univ. of Science and Technology (Saudi Arabia); Riccardo Piccoli, Young-Gyun Jeong, Stéphane Payeur, François Vidal, Institut National de la Recherche Scientifique (Canada); O-Pil Kwon, Seung-Heon Lee, Ajou Univ. (Korea, Republic of); Roberto Morandotti, Institut National de la Recherche Scientifique (Canada), ITMO Univ. (Russian Federation), Univ. of Electronic Science and Technology of China (China); Carlo Liberale, King Abdullah Univ. of Science and Technology (Saudi Arabia); Luca Razzari, Institut National de la Recherche Scientifique (Canada)

Source name: SPIE, Paper 11279-11

Source URL: https://spie.org/PWO/conferencedetails/thz-rf-mm-submm-wave-technology#2542525