Magnetic and electric Mie-exciton polaritons in silicon nanodisks

Todisco, Francesco; Malureanu, Radu; Wolff, Christian; Gonçalves, P. A. D.; Roberts, Alexander Sylvester; Mortensen, N. Asger; Tserkezis, Christos

doi:10.1515/nanoph-2019-0444

Cited by 45 publications

(35 citation statements)

References 70 publications

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“…An alternative approach—which is particularly useful in the presence of large losses typical of plasmonic cavities—is to make use of the formalism introduced in ref. , and define the following figure‐of‐merit (FOM)

Q_{R} = \frac{2 E_{R}}{{normalΓ}_{pl} + {normalΓ}_{ex}}

As detailed in ref. , this quantity is a quality factor that essentially quantifies the number of temporal oscillations in the occupation numbers of the new eigenstates.…”

Section: Strong Light–matter Interactions In Layered Transition Metalmentioning

confidence: 99%

“…, and define the following figure‐of‐merit (FOM)

Q_{R} = \frac{2 E_{R}}{{normalΓ}_{pl} + {normalΓ}_{ex}}

As detailed in ref. , this quantity is a quality factor that essentially quantifies the number of temporal oscillations in the occupation numbers of the new eigenstates. As such, Q R = 1marks the onset of the strong‐coupling regime: for Q R < 1, that is, in the weak coupling regime, the original character of the modes is retained and the emitter population decays exponentially (Figure c; top row); on the other hand, in the strong coupling regime, marked by Q R > 1, the occupation numbers of the hybrid eigenstates oscillate in time with a characteristic Rabi‐like frequency of Ω R = E R /ℏ (Figure c; bottom row).…”

Section: Strong Light–matter Interactions In Layered Transition Metalmentioning

confidence: 99%

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Strong Light–Matter Interactions Enabled by Polaritons in Atomically Thin Materials

Gonçalves

Stenger

Cox

et al. 2020

Advanced Optical Materials

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Polaritons, resulting from the hybridization of light with polarization charges formed at the boundaries between media with positive and negative dielectric response functions, can focus light into regions much smaller than its associated free‐space wavelength. This property is paramount for a plethora of applications in nanophotonics, ranging from biological sensing to photocatalysis to nonlinear and quantum optics. In the two‐dimensional (2D) limit, represented by atomically thin and van der Waals (vdW) materials of single‐layers bound by weak vdW attraction, polaritons are characterized by extremely small wavelengths associated with extreme optical confinement, and furthermore can exhibit long lifetimes, electrical tunability, and extreme sensitivity to their dielectric environment, among many other desirable qualities in nano‐optical device applications. Here, the fundamentals of polaritons in atomically thin materials are summarized, emphasizing plasmon and exciton polaritons, their strong light–matter interactions, and nonlinear plasmonics. More specifically, this review opens with a pedagogical discussion of plasmons in extended and nanostructured graphene, providing a classical electrodynamical model in a nonretarded theoretical framework, and the ultraconfined acoustic plasmons supported by hybrid graphene–dielectric–metal structures. In addition, the basic principles are introduced and the recent developments on nonlinear graphene plasmonics and on strong coupling physics with atomically thin transition metal dichalcogenides are reviewed. Finally, potentially new, promising research directions in the burgeoning field of 2D nanophotonics are identified.

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Q_{R} = \frac{2 E_{R}}{{normalΓ}_{pl} + {normalΓ}_{ex}}

As detailed in ref. , this quantity is a quality factor that essentially quantifies the number of temporal oscillations in the occupation numbers of the new eigenstates.…”

Section: Strong Light–matter Interactions In Layered Transition Metalmentioning

confidence: 99%

“…, and define the following figure‐of‐merit (FOM)

Q_{R} = \frac{2 E_{R}}{{normalΓ}_{pl} + {normalΓ}_{ex}}

Section: Strong Light–matter Interactions In Layered Transition Metalmentioning

confidence: 99%

Strong Light–Matter Interactions Enabled by Polaritons in Atomically Thin Materials

Gonçalves

Stenger

Cox

et al. 2020

Advanced Optical Materials

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“…Achieving the strong coupling regime with Mie resonances has remained challenging due to their moderate field enhancements and large radiative losses. [1,2] Strong coupling results in the hybridization of light and matter into quasiparticles known as excitonpolaritons, with remarkable properties such as enhanced transport, long-range energy transfer, condensation, and non-linear response.…”

Section: Introductionmentioning

confidence: 99%

Strong light-matter coupling in dielectric metasurfaces

et al. 2020

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We demonstrate the strong coupling between excitons in organic molecules and all-dielectric metasurfaces formed by arrays of silicon nanoparticles supporting Mie surface lattice resonances (MSLRs). Compared to Mie resonances in individual nanoparticles, MSLRs have extended mode volumes and much larger quality factors, which enables to achieve collective strong coupling with very large coupling strengths and Rabi energies. Moreover, due to the electric and magnetic character of the MSLR given by the Mie resonance, we show that the hybridization of the exciton with the MSLR results in exciton-polaritons that inherit this character as well. Our results demonstrate the potential of all-dielectric metasurfaces as novel platform to investigate and manipulate exciton-polaritons in low-loss polaritonic devices.

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“…In addition, silicon nanoparticles are promising candidates for spectroscopic measurements close to the particles due to their low heat generation [19]. Strong coupling in silicon nanostructures has been predicted theoretically between J-aggregates and silicon nanospheres [20] and demonstrated experimentally in similar structures [21], as well as in systems of J-aggregates and silicon nanodisks [22,23].…”

Section: Introductionmentioning

confidence: 99%

Strong coupling between organic dye molecules and lattice modes of a dielectric nanoparticle array

et al. 2019

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Plasmonic structures interacting with light provide electromagnetic resonances which result in a high degree of local field confinement enabling the enhancement of light-matter interaction. Plasmonic structures typically consist of metals which, however, suffer from very high ohmic losses and heating. High-index dielectrics, on the other hand, can serve as an alternative material due to their low-dissipative nature and strong scattering abilities. We study the optical properties of a system composed of all-dielectric nanoparticle arrays covered with a film of organic dye molecules (IR-792), and compare these dielectric arrays with metallic nanoparticle arrays. We tune the light-matter interaction by changing the concentration in the dye film and report the system to be in the strong coupling regime. We observe a Rabi splitting between the surface lattice resonances (SLRs) of the nanoparticle arrays and the absorption line of the dye molecules of up to 253 meV and 293 meV, for the dielectric and metallic nanoparticles, respectively. The Rabi splitting depends linearly on the square root of the dye molecule concentration , and we further assess how the Rabi splitting depends on the film thickness for a low dye molecule concentration. For thinner films of thicknesses up to 260 nm, we observe no visible Rabi splitting. However, a Rabi splitting evolves at thicknesses from 540 nm to 990 nm. We perform finite-difference time-domain simulations to analyze the near-field enhancements for the dielectric and metallic nanoparticle arrays. The electric fields are enhanced by a factor of 1200 and 400, close to the particles for gold and amorphous silicon, respectively, and the modes extend over half a micron around the particles for both materials.

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Magnetic and electric Mie-exciton polaritons in silicon nanodisks

Cited by 45 publications

References 70 publications

Strong Light–Matter Interactions Enabled by Polaritons in Atomically Thin Materials

Strong Light–Matter Interactions Enabled by Polaritons in Atomically Thin Materials

Strong light-matter coupling in dielectric metasurfaces

Strong coupling between organic dye molecules and lattice modes of a dielectric nanoparticle array

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