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Near-Field Imaging of Magnetic Complex Mode Volume by Caselli, Niccolò (author);Wu, Tong (author);Arregui, Guillermo (author);Granchi, Nicoletta (author);Intonti, Francesca (author);Lalanne, Philippe (author);Gurioli, Massimo (author) is a Engineering article available to read on EtoBox.

What is Near-Field Imaging of Magnetic Complex Mode Volume about?

The non-Hermitian nature of confined photonic modes is described by the electric complex modal volume, V E , which represents a key parameter that leads to counterintuitive effects, such as negative modal contribution to the local density of states and non-Lorentzian lineshapes. Here, we address the magnetic counterpart of V E by means of near-field perturbation experiments in a photonic crystal slab cavity. We study the relevant role played by the imaginary part of the magnetic modal volume, V H , which can increase the quality factor of the confined modes by means of a local external magnetic perturbation. We show how a mapping of the spatial distribution of both the real and imaginary parts of V H can be inferred by near-field experiments employing Al-covered near-field tips. Our findings deepen the role of the magnetic component of light and could open a new route in employing metamaterials, magnetic quantum emitters, and topological photonics.

Who reads Near-Field Imaging of Magnetic Complex Mode Volume?

Author

Caselli, Niccolò (author);Wu, Tong (author);Arregui, Guillermo (author);Granchi, Nicoletta (author);Intonti, Francesca (author);Lalanne, Philippe (author);Gurioli, Massimo (author)

Publisher

American Chemical Society (ACS)

Published

2021

Language

EN

Field

Engineering (Physical Sciences)