Generation and bistability of a waveguide nanoplasma observed by enhanced 
extreme-ultraviolet fluorescence

Sivis, M.; Ropers, Claus

doi:10.1103/PhysRevLett.111.085001

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Generation and bistability of a waveguide nanoplasma observed by enhanced extreme-ultraviolet fluorescence

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Ropers, Claus
Department of Ultrafast Dynamics, MPI for Biophysical Chemistry, Max Planck Society;

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Citation

Sivis, M., & Ropers, C. (2013). Generation and bistability of a waveguide nanoplasma observed by enhanced extreme-ultraviolet fluorescence. Physical Review Letters, 111(8): 085001. doi:10.1103/PhysRevLett.111.085001.

Cite as: https://hdl.handle.net/21.11116/0000-000B-5D4C-9

Abstract

We present a study of the highly nonlinear optical excitation of noble gases in tapered hollow waveguides using few-femtosecond laser pulses. The local plasmonic field enhancement induces the generation of a nanometric plasma, resulting in incoherent extreme-ultraviolet fluorescence from optical transitions of neutral and ionized xenon, argon, and neon. Despite sufficient intensity in the waveguide, high-order harmonic generation is not observed. The fluorescent emission exhibits a strong bistability manifest as an intensity hysteresis, giving strong indications for multistep collisional excitations.