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Quantum theory of near-field optical imaging with rare-earth atomic clusters

Quantum theory of near-field optical imaging with rare-earth atomic clusters
Quantum theory of near-field optical imaging with rare-earth atomic clusters
Scanning near-field optical imaging (SNOM) using local active probes provides in general images of the electric part of the photonic local density of states. However, certain atomic clusters can supply more information by simultaneously revealing both, the magnetic (m-LDOS) and the electric (e-LDOS) local density of states in the optical range. For example, nanoparticles doped with rare-earth elements like Europium or Terbium provide both, electric dipolar (ED) and magnetic dipolar (MD) transitions. In this theoretical article, we develop a quantum description of active systems (rare earth ions) coupled to a photonic nanostructure, by solving the optical Bloch equations together with Maxwell's equations. This allows us to access the population of the emitting energy levels for all atoms excited by the incident light, degenerated at the extremity of the tip of a near-field optical microscope. We show that it is possible to describe the collected light intensity due to ED and MD transitions in a scanning configuration. By carrying out simulations on different experimentally interesting systems, we demonstrate that our formalism can be of great value for the interpretation of experimental configurations including various external parameters (laser intensity, polarization and wavelength, the SNOM probe size, the nature of the sample.
0740-3224
1474-1484
Majorel, Clément
385373ec-4fde-46e5-aa61-10047d17d5b6
Girard, Christian
4b0c5fc8-84bb-4162-8758-83e3457d2eb2
Cuche, Aurélien
779ddbb9-d3a3-4822-9356-9a55bd29e425
Arbouet, Arnaud
66c72b54-e714-4f7e-9c10-6bbee132291e
Wiecha, Peter
fb335482-9577-41af-a0ef-3988b7654c9b
Majorel, Clément
385373ec-4fde-46e5-aa61-10047d17d5b6
Girard, Christian
4b0c5fc8-84bb-4162-8758-83e3457d2eb2
Cuche, Aurélien
779ddbb9-d3a3-4822-9356-9a55bd29e425
Arbouet, Arnaud
66c72b54-e714-4f7e-9c10-6bbee132291e
Wiecha, Peter
fb335482-9577-41af-a0ef-3988b7654c9b

Majorel, Clément, Girard, Christian, Cuche, Aurélien, Arbouet, Arnaud and Wiecha, Peter (2020) Quantum theory of near-field optical imaging with rare-earth atomic clusters. Journal of the Optical Society of America B, 37 (5), 1474-1484, [385918]. (doi:10.1364/JOSAB.385918).

Record type: Article

Abstract

Scanning near-field optical imaging (SNOM) using local active probes provides in general images of the electric part of the photonic local density of states. However, certain atomic clusters can supply more information by simultaneously revealing both, the magnetic (m-LDOS) and the electric (e-LDOS) local density of states in the optical range. For example, nanoparticles doped with rare-earth elements like Europium or Terbium provide both, electric dipolar (ED) and magnetic dipolar (MD) transitions. In this theoretical article, we develop a quantum description of active systems (rare earth ions) coupled to a photonic nanostructure, by solving the optical Bloch equations together with Maxwell's equations. This allows us to access the population of the emitting energy levels for all atoms excited by the incident light, degenerated at the extremity of the tip of a near-field optical microscope. We show that it is possible to describe the collected light intensity due to ED and MD transitions in a scanning configuration. By carrying out simulations on different experimentally interesting systems, we demonstrate that our formalism can be of great value for the interpretation of experimental configurations including various external parameters (laser intensity, polarization and wavelength, the SNOM probe size, the nature of the sample.

Text
josa B quantum snom accepted version - Accepted Manuscript
Restricted to Repository staff only until 22 April 2021.
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More information

In preparation date: 2019
Accepted/In Press date: 30 March 2020
e-pub ahead of print date: 23 April 2020
Published date: 1 May 2020

Identifiers

Local EPrints ID: 436554
URI: http://eprints.soton.ac.uk/id/eprint/436554
ISSN: 0740-3224
PURE UUID: 10ae6f91-8ed3-4353-a11c-cbbdc4cd130d

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Date deposited: 03 Jun 2020 16:30
Last modified: 09 Oct 2020 16:30

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Contributors

Author: Clément Majorel
Author: Christian Girard
Author: Aurélien Cuche
Author: Arnaud Arbouet
Author: Peter Wiecha

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