Strong coupling in plasmonic metal nanoparticles

Abstract

The study of strong coupling between light and matter has gained significant attention in recent years due to its potential applications in diverse fields, including artificial light harvesting, ultraefficient polariton lasing, and quantum information processing. Plasmonic cavities are a compelling alternative of conventional photonic resonators, enabling ultracompact polaritonic systems to operate at room temperature. This review focuses on colloidal metal nanoparticles, highlighting their advantages as plasmonic cavities in terms of their facile synthesis, tunable plasmonic properties, and easy integration with excitonic materials. We explore recent examples of strong coupling in single nanoparticles, dimers, nanoparticle-on-a-mirror configurations, and other types of nanoparticle-based resonators. These systems are coupled with an array of excitonic materials, including atomic emitters, semiconductor quantum dots, two-dimensional materials, and perovskites. In the concluding section, we offer perspectives on the future of strong coupling research in nanoparticle systems, emphasizing the challenges and potentials that lie ahead. By offering a thorough understanding of the current state of research in this field, we aim to inspire further investigations and advances in the study of strongly coupled nanoparticle systems, ultimately unlocking new avenues in nanophotonic applications.

Nanoparticles for efficient drug delivery and drug resistance in glioma: New perspectives

“…Quantum dots have a small number (1-100) of integer electron, hole, and hole-electron pairs with an integer multiple of meta-charge. [136][137][138] Quantum dots have unique optoelectronic properties, allowing energy levels to be tuned by wavelength and color, and by controlling their size, particles can be made to emit or absorb light at specific wavelengths. [139][140][141] Superparamagnetic iron oxide nanoparticles Superparamagnetic iron oxide nanoparticles (SPIONs) are nanomaterials with superparamagnetic properties and core diameters ranging from 3 to 15 nm; SPIONs have excellent magnetic properties and stability and can be stabilized under physiological conditions.…”

“…Quantum dots have separated quantized energy spectra with wave functions that are spatially located within the quantum dot but spread over several lattice periods. Quantum dots have a small number (1–100) of integer electron, hole, and hole–electron pairs with an integer multiple of meta‐charge 136–138 . Quantum dots have unique optoelectronic properties, allowing energy levels to be tuned by wavelength and color, and by controlling their size, particles can be made to emit or absorb light at specific wavelengths 139–141 …”

“…Quantum dots have a small number (1–100) of integer electron, hole, and hole–electron pairs with an integer multiple of meta‐charge. 136 , 137 , 138 Quantum dots have unique optoelectronic properties, allowing energy levels to be tuned by wavelength and color, and by controlling their size, particles can be made to emit or absorb light at specific wavelengths. 139 , 140 , 141 …”

Strong Plasmon-Exciton Coupling in Colloidal Cubic Nanoparticles and Layered Molecular J-aggregates

“…[1][2][3][4][5][6][7][8][9][10] Among the diverse resonator architectures, plasmonic metal nanostructures receive significant attention for their ability to couple with various excitonic materials owing to their highly localized electromagnetic fields that exceed the diffraction limit. [11][12][13][14][15][16][17][18][19][20] The generation of polaritons within individual metal nanoparticle units offers distinct advantages, such as simplified structural configurations and enhanced controllability over plasmon-exciton interactions. [21][22][23] The measure of this interaction, denoted as the coupling strength g, can be understood by the relationship 𝑔 ∝ # ℏ" # !…”

Unveiling the Synergy of Coupled Gold Nanoparticles and J-Aggregates in Plexcitonic Systems for Enhanced Photochemical Applications

“…They exhibit narrow and intense LSPR response and have only recently gained attention for building plexcitonic systems. To the best of our knowledge, there exist a limited number of studies involving AuBPs/J-aggregates of cyanine dyes [ 28 , 29 ]. However, it is worth noting that despite the common use of TDBC in strong coupling experiments [ 30 ], its stability in J-aggregate morphology is rather compromised, as is the case with most cyanine dyes.…”