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Active magnetoplasmonic ruler

Journal article
Authors Irina Zubritskaya
Kristof Lodewijks
Nicolò Maccaferri
Addis Mekonnen
Randy K. Dumas
Johan Åkerman
Paolo Vavassori
Alexandre Dmitriev
Published in Nano letters
Volume 15
Issue 5
Pages 3204–3211
ISSN 1530-6984
Publication year 2015
Published at Department of Physics (GU)
Pages 3204–3211
Language en
Links http://dx.doi.org/10.1021/acs.nano...
Keywords magnetoplasmonics, plasmon ruler, nickel, cobalt, localized surface plasmon resonance, magneto-optical Kerr effect (MOKE), dimer
Subject categories Nano Technology

Abstract

Plasmon rulers are an emerging concept in which the strong near-field coupling of plasmon nanoantenna elements is employed to obtain structural information at the nanoscale. Here, we combine nanoplasmonics and nanomagnetism to conceptualize a magnetoplasmonic dimer nanoantenna that would be able to report nanoscale distances while optimizing its own spatial orientation. The latter constitutes an active operation in which a dynamically optimized optical response per measured unit length allows for the measurement of small and large nanoscale distances with about 2 orders of magnitude higher precision than current state-of-the-art plasmon rulers. We further propose a concept to optically measure the nanoscale response to the controlled application of force with a magnetic field.

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