Enhancement of electric and magnetic dipole transition of rare-earth doped thin films tailored by high-index dielectric nanostructures

Abstract

We propose a simple experimental technique to separately map the emission from electric and magnetic dipole transitions close to single dielectric nanostructures, using a few nanometer thin film of rare-earth ion doped clusters. Rare-earth ions provide electric and magnetic dipole transitions of similar magnitude. By recording the photoluminescence from the deposited layer excited by a focused laser beam, we are able to simultaneously map the electric and magnetic emission enhancement on individual nanostructures. In spite of being a diffraction-limited far-field method with a spatial resolution of a few hundred nanometers, our approach appeals by its simplicity and high signal-to-noise ratio. We demonstrate our technique at the example of single silicon nanorods and dimers, in which we find a significant separation of electric and magnetic near-field contributions. Our method paves the way towards the efficient and rapid characterization of the electric and magnetic optical response of complex photonic nanostructures.

arXiv comment10 pages and 7 figures

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• Measuring the magnetic dipole transition of single nanorods by spectroscopy and Fourier microscopy
• Unveiling the optical emission channels of monolayer semiconductors coupled to silicon nanoantennas
• Electromagnetic energy in multilayered spherical particles
• The Control of the Elementary Quantum Systems Radiation Using Metamaterials and Nanometaparticles
• Control of light emission of quantum emitters coupled to silicon nanoantenna using cylindrical vector beams
• Quantum Theory of Near-field Optical Imaging with Rare-earth Atomic Clusters
• Generation of nearly pure and highly directional magnetic light in fluorescence of rare earth ions
• Vectorial probing of electric and magnetic transitions in variable optical environments and vice-versa
• Magnetic and electric Purcell factor control through geometry optimization of high index dielectric nanostructures