Ultraintense Femtosecond Magnetic Nanoprobes Induced by Azimuthally Polarized Laser Beams

被引：16

作者：

Blanco, Manuel ^{[1
]}

Cambronero, Ferran ^{[1
]}

Teresa Flores-Arias, M. ^{[1
]}

Conejero Jarque, Enrique ^{[2
]}

Plaja, Luis ^{[2
]}

Hernandez-Garcia, Carlos ^{[2
]}

机构：

[1] Univ Santiago de Compostela, Dept Fis Aplicada, Grp Invest Photonics4Life, Area Opt, E-15782 Santiago De Compostela, Spain

[2] Univ Salamanca, Dept Fis Aplicada, Grp Invest Aplicac Laser & Foton, E-37008 Salamanca, Spain

来源：

ACS PHOTONICS | 2019年 / 6卷 / 01期

关键词：

ultrafast magnetism; vector laser beams; femtosecond laser pulses; magnetic nanoprobes; femtomagnetism; nanophotonics; ultraintense magnetic field; VECTOR BEAMS; FIELD; HARMONICS; DYNAMICS; SPIN;

D O I：

10.1021/acsphotonics.8b01312

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

We report a novel scheme to generate laser-induced, ultrafast, intense (Tesla scale), spatially isolated, magnetic fields. Three-dimensional particle-in-cell simulations show that a femtosecond azimuthally polarized infrared vector beam, aimed at a conducting circular aperture, produces an intense axially polarized tip-shaped femtosecond magnetic field, extending over micrometer distances and being isolated from the electric field. Our results are backed up by an analytic model, demonstrating the underlying physics and guiding for optimal parameters. In particular, we find the conditions under which the magnetic nanoprobe is substantially enhanced, reaching 4 T when driven by a 10(11) W/cm(2) laser field, which reflects a selective enhancement by a factor of similar to 6. Our scheme offers a promising tool to control, probe, and tailor magnetic nanodomains in femtosecond time scales through pure magnetic interaction by using structured laser beams.

引用

页码：38 / 42

页数：9

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