2013/03/25 by Anagnostis Tsiatmas, Evangelos Atmatzakis, Nikitas Papasimakis +4 · 1 citation
Physics and Astronomy · #cond-mat.mes-hall
paper · pdf · doi:10.1088/1367-2630/15/11/113035
published as New Journal of Physics 15, 113035 (2013) · 11 pages, 10 figures
arxiv created 2013/03/25 · arxiv updated 2015/06/25
Generating, controlling, and sensing strong magnetic fields at ever shorter time and length scales is important for both fundamental solid-state physics and technological applications such as magnetic data recording. Here, we propose a scheme for producing strong ultrashort magnetic pulses localized at the nanoscale. We show that a bimetallic nanoring illuminated by femtosecond laser pulses responds with transient thermoelectric currents of picosecond duration, which in turn induce Tesla-scale magnetic fields in the ring cavity. Our method provides a practical way of generating intense nanoscale magnetic fields with great potential for materials characterization, terahertz radiation generation, and data storage applications.