Terahertz field-driven photoemission via 3D-printed resonant nanocones

Andrea Rovere; Riccardo Piccoli; Andrea Bertoncini; Young-Gyun Jeong; Stéphane Payeur; François Vidal; O-Pil Kwon; Seung-Heon Lee; Jin-Hong Seok; Roberto Morandotti; Carlo Liberale; Luca Razzari

doi:10.1117/12.2577701

5 March 2021 Terahertz field-driven photoemission via 3D-printed resonant nanocones

Andrea Rovere, Riccardo Piccoli, Andrea Bertoncini, Young-Gyun Jeong, Stéphane Payeur, François Vidal, O-Pil Kwon, Seung-Heon Lee, Jin-Hong Seok, Roberto Morandotti, Carlo Liberale, Luca Razzari

Author Affiliations +

Proceedings Volume 11684, Ultrafast Phenomena and Nanophotonics XXV; 1168409 (2021) https://doi.org/10.1117/12.2577701
Event: SPIE OPTO, 2021, Online Only

Abstract

We exploit the strong field enhancement offered by vertical gold nanocones resonating at 1 THz to induce THz field-driven electron emission. The nanocones are fabricated via an advanced 3D printing technique on a photopolymer and are successively gold coated. We demonstrate the clear advantage offered by nanocones featuring a monopolar resonance at THz frequencies with respect to traditional non-resonant tips via numerical modelling, THz far-field characterization, and the analysis of electron-induced argon gas fluorescence. Finally, we show that a further degree of optimization is enabled by tailoring the collective response of the nanocones when arranged in an array geometry.

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Andrea Rovere, Riccardo Piccoli, Andrea Bertoncini, Young-Gyun Jeong, Stéphane Payeur, François Vidal, O-Pil Kwon, Seung-Heon Lee, Jin-Hong Seok, Roberto Morandotti, Carlo Liberale, and Luca Razzari "Terahertz field-driven photoemission via 3D-printed resonant nanocones", Proc. SPIE 11684, Ultrafast Phenomena and Nanophotonics XXV, 1168409 (5 March 2021); https://doi.org/10.1117/12.2577701

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