Strong coupling effects in a plexciton system of gold nanostars and J-aggregates

Melnikau, Dzmitry; Samokhvalov, Pavel; Sánchez‐Iglesias, Ana; Grzelczak, Marek; Nabiev, Igor; Rakovich, Yury P.

doi:10.1016/j.jlumin.2021.118557

Cited by 18 publications

(8 citation statements)

References 59 publications

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“…Note that because of intrinsic NUs’ size and shape distributions, the full‐width‐at‐half‐maximum of the extinction spectrum overestimates the γ NUs parameter, which may in turn lead to an underestimation of the coupling regime. [ 37 ] Notwithstanding, the abovementioned condition for the formation of hybrid plexciton states in the investigated nanohybrids remains strictly valid. This is a crucial point for the interpretation of the photophysical behavior of nanohybrids.…”

Section: Resultsmentioning

confidence: 99%

Coherent Dynamics in Solutions of Colloidal Plexcitonic Nanohybrids at Room Temperature

Peruffo

Mancin

Collini

2023

Advanced Optical Materials

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The increasing ability to prepare systems with nanoscale resolution and address their optical properties with ultrashort time precision is revealing quantum phenomena with tremendous potential in quantum nanotechnologies. Colloidal plexcitonic materials promise to play a pivotal role in this scenario. Plexcitons are hybrid states originating from the mixing of the plasmon resonances of metal nanostructures with molecular excitons. They allow nanoscale confinement of electromagnetic fields and the establishment of strong couplings between light and matter, potentially giving rise to controllable and tunable coherent phenomena. However, the characterization of the ultrafast coherent and incoherent dynamics of colloidal plexciton nanohybrids remains highly unexplored. Here, two dimensional electronic spectroscopy (2DES) is employed to study the quantum coherent interactions active after the photoexcitation of these systems. By comparing the response of the nanohybrids with the one of the uncoupled systems, the nonlinear photophysical processes at the base of the coherent dynamics are identified, allowing a step forward toward the effective understanding and exploitation of these nanomaterials.

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Section: Resultsmentioning

confidence: 99%

Coherent Dynamics in Solutions of Colloidal Plexcitonic Nanohybrids at Room Temperature

Peruffo

Mancin

Collini

2023

Advanced Optical Materials

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“…The ratio used to classify the interaction of type (iii) when the CL and the QEs had complementary interaction sites (usually opposite net charges). In contrast, interaction (iv) is assumed in the other cases, like for the CL/QEs pairs Styryl 9/M-SOt, JC1/cationic surfactant, − and TDBC/PVP and TDBC/citrate . In some situations, interactions (iii) and (iv) are considered acting together. ,,,− Interaction (iii) is assumed also in the case of dyes covalently linked to polymeric CLs .…”

Section: Resultsmentioning

confidence: 99%

Identification of Design Principles for the Preparation of Colloidal Plexcitonic Materials

Peruffo,

Bruschi,

Fresch

et al. 2023

Langmuir

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Colloidal plexcitonic materials (CPMs) are a class of nanosystems where molecular dyes are strongly coupled with colloidal plasmonic nanoparticles, acting as nanocavities that enhance the light field. As a result of this strong coupling, new hybrid states are formed, called plexcitons, belonging to the broader family of polaritons. With respect to other families of polaritonic materials, CPMs are cheap and easy to prepare through wet chemistry methodologies. Still, clear structure-to-properties relationships are not available, and precise rules to drive the materials’ design to obtain the desired optical properties are still missing. To fill this gap, in this article, we prepared a dataset with all CPMs reported in the literature, rationalizing their design by focusing on their three main relevant components (the plasmonic nanoparticles, the molecular dyes, and the capping layers) and identifying the most used and efficient combinations. With the help of statistical analysis, we also found valuable correlations between structure, coupling regime, and optical properties. The results of this analysis are expected to be relevant for the rational design of new CPMs with controllable and predictable photophysical properties to be exploited in a vast range of technological fields.

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“…The hybrid state should satisfy the condition of |α 2 + β 2 | = 1, which is nothing but the weighting coefficients of the fraction of Mie resonance mode (MQ/ED/AM) and exciton mode. The Hopfield coefficients can be determined using the following formula, α UEB = β LEB = ( E Mie − E exc ) + false( E Mie − E exc false) 2 + normalΩ normalR 2 2 false( E Mie 2 − E exc 2 false) 2 + normalΩ normalR 2 α LEB = β UEB = 1 − α UEB The energy of the hybrid state ( E UEB/LEB ) can be expressed as E UEB/LEB = 1 2 ( E Mie + E exc ) ± g 2 + 0.25 true( ( E …”

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Magnetic Quadrupole-Exciton, Electric Dipole-Exciton, and Anapole-Exciton Interaction-Mediated Resonance Energy Transfer in Mie-Exciton Heterostructure

Das,

Saha,

Vadivel

2023

ACS Appl. Opt. Mater.

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Controlling and comprehending light–matter interactions at the nanoscale constitutes a central objective due to its applications in nanophotonic devices and quantum information processing. This study presents numerical simulations focused on Mie-exciton heterostructures, specifically investigating the mode coupling among the electric dipole-exciton, magnetic quadrupole-exciton, and anapole mode-exciton. The Mie resonance modes originate from a high-index silicon (Si) nanosphere resonator, while the exciton is derived from a WS2 monolayer. The light–matter interaction between Si and the WS2 monolayer leads to mode hybridization and resonance coupling. By employing the classical coupled oscillator model and calculating Hopfield coefficients, strong coupling between modes is demonstrated. The results exhibit an intriguing anticrossing behavior, providing compelling evidence of the strong coupling between Mie resonances and exciton resonances. Moreover, we explore the influence of the number of monolayers and the size of the Si nanoresonator on mode hybridization and resonance coupling. Our findings reveal that the coupling strength and coherent energy transfer between different modes are highly sensitive to both the number of WS2 monolayers and the size of the Si nanoresonator. The insights gained from this research hold significant promise for the advancement of polariton-exciton nanodevices and quantum technologies.

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Strong coupling effects in a plexciton system of gold nanostars and J-aggregates

Cited by 18 publications

References 59 publications

Coherent Dynamics in Solutions of Colloidal Plexcitonic Nanohybrids at Room Temperature

Coherent Dynamics in Solutions of Colloidal Plexcitonic Nanohybrids at Room Temperature

Identification of Design Principles for the Preparation of Colloidal Plexcitonic Materials

Magnetic Quadrupole-Exciton, Electric Dipole-Exciton, and Anapole-Exciton Interaction-Mediated Resonance Energy Transfer in Mie-Exciton Heterostructure

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