Nanotip response to monocycle terahertz pulses

Jonathan Houard (1) , L. Arnoldi (1) , A. Ayoub (1) , A. Hideur (2) , Angela Vella (1)

1 GPM - Groupe de physique des matériaux
2 CORIA - Complexe de recherche interprofessionnel en aérothermochimie

The interaction of monocycle terahertz (THz) fields with metal nanostructures such as nanotips is attracting a lot of interest for the development of new applications such as THz-scanning tunneling microscopy and ultra-fast field emission. New methods have been introduced to measure the enhanced THz near field waveform in the vicinity of a nanotip surface. Here, we present results obtained by electron field emission in the multiphoton emission regime. The nanotip mimics the behavior of an antenna with a simplified equivalent circuit. We show that the electrical characteristics can be calculated using the nanowire geometry approximation and taking into account a conduction shell with a thickness smaller than the material skin depth. The results introduce a method to predict the antenna response of the nanotip and thus the near THz field waveform.

Mots clés: Field emission; terahertz

Domaines: Optique [physics.optics]

Jonathan Houard, L. Arnoldi, A. Ayoub, A. Hideur, Angela Vella. Nanotip response to monocycle terahertz pulses. Applied Physics Letters, 2020, 117 (15), pp.151105. ⟨10.1063/5.0022182⟩. ⟨hal-02968928⟩