Anagnostis Tsiatmas, Evangelos Atmatzakis, Nikitas Papasimakis, Vassili Fedotov, Boris Lukyanchuk, Nikolay I. Zheludev, F. Javier Garcia de Abajo
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.
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http://arxiv.org/abs/1303.6072
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