Mie-excitons: understanding strong coupling in dielectric nanoparticles

C. Tserkezis, P. A. D. Gonçalves, Christian Wolff, F. Todisco, K. Busch, N. A. Mortensen

Research output: Working paper

Abstract

We theoretically analyse the hybrid Mie-exciton optical modes arising from the strong coupling of excitons in organic dyes or transition-metal dichalcogenides with the Mie resonances of high-index dielectric nanoparticles. Detailed analytic calculations show that silicon--exciton core--shell nanoparticles are characterised by a richness of optical modes which can be tuned through nanoparticle dimensions to produce large anticrossings in the visible or near infrared, comparable to those obtained in plexcitonics. The complex magnetic-excitonic nature of these modes is understood through spectral decomposition into Mie-coefficient contributions, complemented by electric and magnetic near-field profiles. In the frequency range of interest, absorptive losses in silicon are sufficiently low to allow observation of several periods of Rabi oscillations in strongly coupled emitter-particle architectures, as confirmed here by discontinuous Galerkin time-domain calculations for the electromagnetic field beat patterns. These results suggest that Mie resonances in high-index dielectrics are promising alternatives for plasmons in strong-coupling applications in nanophotonics, while the coupling of magnetic and electric modes opens intriguing possibilities for external control.
Original languageEnglish
Publication statusPublished - 2 May 2018

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excitons
nanoparticles
silicon
plasmons
synchronism
near fields
electromagnetic fields
emitters
frequency ranges
dyes
transition metals
decomposition
oscillations
coefficients
profiles

Bibliographical note

© 2018 The Authors

Funding: MSCA-COFUND-MULTIPLY - Grant number 713694 - H2020.

Cite this

Tserkezis, C., Gonçalves, P. A. D., Wolff, C., Todisco, F., Busch, K., & Mortensen, N. A. (2018). Mie-excitons: understanding strong coupling in dielectric nanoparticles.
Tserkezis, C. ; Gonçalves, P. A. D. ; Wolff, Christian ; Todisco, F. ; Busch, K. ; Mortensen, N. A. . / Mie-excitons: understanding strong coupling in dielectric nanoparticles. 2018.
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Tserkezis, C, Gonçalves, PAD, Wolff, C, Todisco, F, Busch, K & Mortensen, NA 2018 'Mie-excitons: understanding strong coupling in dielectric nanoparticles'.

Mie-excitons: understanding strong coupling in dielectric nanoparticles. / Tserkezis, C. ; Gonçalves, P. A. D. ; Wolff, Christian; Todisco, F. ; Busch, K. ; Mortensen, N. A. .

2018.

Research output: Working paper

TY - UNPB

T1 - Mie-excitons: understanding strong coupling in dielectric nanoparticles

AU - Tserkezis, C.

AU - Gonçalves, P. A. D.

AU - Wolff, Christian

AU - Todisco, F.

AU - Busch, K.

AU - Mortensen, N. A.

N1 - © 2018 The Authors Funding: MSCA-COFUND-MULTIPLY - Grant number 713694 - H2020.

PY - 2018/5/2

Y1 - 2018/5/2

N2 - We theoretically analyse the hybrid Mie-exciton optical modes arising from the strong coupling of excitons in organic dyes or transition-metal dichalcogenides with the Mie resonances of high-index dielectric nanoparticles. Detailed analytic calculations show that silicon--exciton core--shell nanoparticles are characterised by a richness of optical modes which can be tuned through nanoparticle dimensions to produce large anticrossings in the visible or near infrared, comparable to those obtained in plexcitonics. The complex magnetic-excitonic nature of these modes is understood through spectral decomposition into Mie-coefficient contributions, complemented by electric and magnetic near-field profiles. In the frequency range of interest, absorptive losses in silicon are sufficiently low to allow observation of several periods of Rabi oscillations in strongly coupled emitter-particle architectures, as confirmed here by discontinuous Galerkin time-domain calculations for the electromagnetic field beat patterns. These results suggest that Mie resonances in high-index dielectrics are promising alternatives for plasmons in strong-coupling applications in nanophotonics, while the coupling of magnetic and electric modes opens intriguing possibilities for external control.

AB - We theoretically analyse the hybrid Mie-exciton optical modes arising from the strong coupling of excitons in organic dyes or transition-metal dichalcogenides with the Mie resonances of high-index dielectric nanoparticles. Detailed analytic calculations show that silicon--exciton core--shell nanoparticles are characterised by a richness of optical modes which can be tuned through nanoparticle dimensions to produce large anticrossings in the visible or near infrared, comparable to those obtained in plexcitonics. The complex magnetic-excitonic nature of these modes is understood through spectral decomposition into Mie-coefficient contributions, complemented by electric and magnetic near-field profiles. In the frequency range of interest, absorptive losses in silicon are sufficiently low to allow observation of several periods of Rabi oscillations in strongly coupled emitter-particle architectures, as confirmed here by discontinuous Galerkin time-domain calculations for the electromagnetic field beat patterns. These results suggest that Mie resonances in high-index dielectrics are promising alternatives for plasmons in strong-coupling applications in nanophotonics, while the coupling of magnetic and electric modes opens intriguing possibilities for external control.

M3 - Working paper

BT - Mie-excitons: understanding strong coupling in dielectric nanoparticles

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Tserkezis C, Gonçalves PAD, Wolff C, Todisco F, Busch K, Mortensen NA. Mie-excitons: understanding strong coupling in dielectric nanoparticles. 2018 May 2.