Quantifying the magnetic nature of light emission

Tim H. Taminiau, Sinan Karaveli, Niek F. van Hulst and Rashid Zia ()
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Tim H. Taminiau: Brown University, School of Engineering
Sinan Karaveli: Brown University, School of Engineering
Niek F. van Hulst: ICFO - Institut de Ciencies Fotoniques, Mediterranean Technology Park
Rashid Zia: Brown University, School of Engineering

Nature Communications, 2012, vol. 3, issue 1, 1-6

Abstract: Abstract Tremendous advances in the study of magnetic light-matter interactions have recently been achieved using man-made nanostructures that exhibit and exploit an optical magnetic response. However, naturally occurring emitters can also exhibit magnetic resonances in the form of optical-frequency magnetic-dipole transitions. Here we quantify the magnetic nature of light emission using energy- and momentum-resolved spectroscopy, and leverage a pair of spectrally close electric- and magnetic-dipole transitions in trivalent europium to probe vacuum fluctuations in the electric and magnetic fields at the nanometre scale. These results reveal a new tool for nano-optics: an atomic-size quantum emitter that interacts with the magnetic component of light.

Date: 2012
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DOI: 10.1038/ncomms1984

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