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Nanotip response to monocycle terahertz pulses

Abstract : 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.
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https://hal.archives-ouvertes.fr/hal-02968928
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Submitted on : Friday, October 16, 2020 - 11:14:39 AM
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J. Houard, L. Arnoldi, A. Ayoub, A. Hideur, A. Vella. Nanotip response to monocycle terahertz pulses. Applied Physics Letters, American Institute of Physics, 2020, 117 (15), pp.151105. ⟨10.1063/5.0022182⟩. ⟨hal-02968928⟩

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