Ultrafocused electromagnetic field pulses with a hollow cylindrical waveguide

Maurer, P, Prat-Camps, J, Cirac, J I, Hänsch, T W and Romero-Isart, O (2017) Ultrafocused electromagnetic field pulses with a hollow cylindrical waveguide. Physical Review Letters, 119 (043904). ISSN 0031-9007

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Abstract

We theoretically show that a dipole externally driven by a pulse with a lower-bounded temporal width, and placed inside a cylindrical hollow waveguide, can generate a train of arbitrarily short and focused electromagnetic pulses. The waveguide encloses vacuum with perfect electric conducting walls. A dipole driven by a single short pulse, which is properly engineered to exploit the linear spectral filtering of the cylindrical hollow waveguide, excites longitudinal waveguide modes that are coherently refocused at some particular instances of time, thereby producing arbitrarily short and focused electromagnetic pulses. We numerically show that such ultrafocused pulses persist outside the cylindrical waveguide at distances comparable to its radius.

Item Type: Article
Schools and Departments: School of Engineering and Informatics > Informatics
Subjects: Q Science > QC Physics > QC0350 Optics. Light
Depositing User: Jordi Prat Camps
Date Deposited: 24 Apr 2018 13:52
Last Modified: 02 Jul 2019 16:00
URI: http://sro.sussex.ac.uk/id/eprint/75373

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