Plasmonic nano-focusing of particle beams by surface crunch-in plasmons excited in tapered tubes

Aakash A. Sahai

doi:10.1117/12.2605722

7 March 2022 Plasmonic nano-focusing of particle beams by surface crunch-in plasmons excited in tapered tubes

Aakash A. Sahai

Proceedings Volume 11999, Ultrafast Phenomena and Nanophotonics XXVI; 1199903 (2022) https://doi.org/10.1117/12.2605722
Event: SPIE OPTO, 2022, San Francisco, California, United States

Abstract

Plasmonics has been revolutionized by techniques that effectively couple light to plasmonic modes in nanomaterials. Although plasmonics was originally discovered using particle beams, ease of access to lasers and advances in coupling techniques such as nano-focusing have boosted optical plasmonics. In this work, we introduce plasmonic nano-focusing of particle beams as a means of accessing unprecedented PetaVolts per meter EM fields. PV/m fields are supported by electron bunches compressed to densities approaching that of the free electron Fermi gas in conducting materials. Strong focusing forces are sustained by a novel strongly electrostatic surface crunch-in plasmonic mode driven in a tube by charged particle bunches. Nano-focusing is made possible by this crunch-in mode when excited in tubes with tapered radius. Surface plasmons not only allow controlled focusing of the bunch but also efficient coupling by avoiding collisional disruption and losses. Plasmonic nano-focusing can bring forth ultra-solid particle beams of nanometric dimensions which stand to open unforeseen possibilities.

Conference Presentation

Citation Download Citation

Aakash A. Sahai "Plasmonic nano-focusing of particle beams by surface crunch-in plasmons excited in tapered tubes", Proc. SPIE 11999, Ultrafast Phenomena and Nanophotonics XXVI, 1199903 (7 March 2022); https://doi.org/10.1117/12.2605722

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