Physics

Nanophotonics for pair production

V. D. Giulio and F. J. G. D. Abajo

This exciting research by Valerio Di Giulio and F. Javier García de Abajo explores the potential of intense optical near fields in nanostructured materials to generate electron-positron pairs using high-energy photons. Their findings reveal that the interaction of near-threshold γ-rays with polaritons significantly enhances pair-production cross sections compared to free-space photons, paving the way for tunable pulsed positron generation from nanoscale regions.

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Abstract

This paper proposes using intense, strongly confined optical near fields supported by nanostructured materials with high-energy photons to create electron-positron pairs. It demonstrates that the interaction between near-threshold γ-rays and polaritons yields higher pair-production cross sections than free-space photons, opening a new avenue for generating tunable pulsed positrons from nanoscale regions.

Publisher

Nature Communications

Published On

Dec 11, 2023

Authors

Valerio Di Giulio, F. Javier García de Abajo

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