Work

Physics-Based Optimization of Tapered Suspended Slot Waveguides for Electron Acceleration

Year: 2025

Type: article

Abstract: In this letter, we present a physics-assisted design strategy for tapered suspended slot waveguides operating at 2 μm. The proposed methodology enables a precise control of the optical field, specifically tailored for laser-driven dielectric accelerating structures. By using calibration curves that link the silicon waveguide strips width to both the effective refractive index and the accelerating field amplitude, we ensure local phase synchronism along the propagation axis. The design was performed for an input energy of 79 keV, and validated by HFSS simulations as far as the optical field computation is concerned, and by ASTRA-code for the single-particle beam dynamics. The results show an output energy of 102 keV with the optimized structure, corresponding to 20% increase compared to the previous constant-field approach.

Source: IEEE Photonics Technology Letters

DOI: 10.1109/lpt.2025.3645138

Authors: Roberta Palmeri, Davide Guarnera, Giuseppe Torrisi, Giorgio S. Mauro, David Mascali, Alberto Bacci, Nunzio Salerno, Santi C. Pavone, Andrea Locatelli, Gino Sorbello

Institutions: University of Reggio Calabria, University of Catania, Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali del Sud, Istituto Nazionale di Fisica Nucleare, Sezione di Milano, University of Brescia

Language: English

Topic: Particle Accelerators and Free-Electron Lasers

Subfield: Electrical and Electronic Engineering

Field: Engineering

Domain: Physical Sciences

Open Access status: hybrid

Estimated APC paid: $2,645

OpenAlex ID: W4417438774

FWCI: 0.231

Cites: 16

Cited by: 1

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