Deep strong light–matter coupling in plasmonic nanoparticle crystals

Mueller, Niclas S.; Okamura, Yu; Vieira, Bruno G. M.; Juergensen, Sabrina; Lange, Holger; Barros, Eduardo B.; Schulz, Florian; Reich, Stéphanie

doi:10.1038/s41586-020-2508-1

Cited by 203 publications

(218 citation statements)

References 47 publications

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“…Pronounced absorbance peaks appear in the NIR spectral range from the direct optical excitation of plasmon polaritons that form standing waves in the supercrystals (see insets) 35,36,63 . With each additional layer a new polaritonic mode is activated, starting from a single mode for a bilayer 35,36 . The excitation of plasmon-polaritons leads to pronounced reflectance dips and transmittance maxima in the optical spectra ( Fig.…”

Section: Resultsmentioning

confidence: 99%

“…3c). A polaritonic stop band prevents light from entering the supercrystal in the visible spectral range and light is mostly reflected 35 . The reflectance decreases for excitation energies larger than 2 eV because of the interband transitions of gold.…”

Section: Resultsmentioning

confidence: 99%

“…3c), demonstrating the control of the structural parameters in the synthesis process. The number, energy, and spectral width of the polaritonic modes depends sensitively on the interparticle distance, number of layers, AuNP shape, diameter, and lattice type 35,36,53,54 . In consequence, an accurate control of all these parameters enables the design of tailored optical materials.…”

Section: Resultsmentioning

confidence: 99%

“…A prerequisite for the formation of well-defined coupled modes is the uniformity of the constituents and a high degree of order on relevant scales (optical wavelength). The coupling strength increases with decreasing interparticle spacings, gaps <10 nm are favorable 5,35,38 . Upon today, it has been difficult to combine a high particle uniformity (size and shape) with a high degree of periodic order and large crystalline areas in the desired geometry.…”

mentioning

confidence: 99%

“…This creates a continuum of collective plasmonic states where the electrons of the metal NP crystal remain localized. According to recent experiments, the coupling strength of such periodically coupled plasmons to photons can become comparable to the photon energy 35 . The optical properties are expected to be widely tuneable through crystal symmetry and geometry [35][36][37] .…”

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confidence: 99%

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Structural order in plasmonic superlattices

et al. 2020

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The assembly of plasmonic nanoparticles into ordered 2D-and 3D-superlattices could pave the way towards new tailored materials for plasmonic sensing, photocatalysis and manipulation of light on the nanoscale. The properties of such materials strongly depend on their geometry, and accordingly straightforward protocols to obtain precise plasmonic superlattices are highly desirable. Here, we synthesize large areas of crystalline mono-, bi-and multilayers of gold nanoparticles >20 nm with a small number of defects. The superlattices can be described as hexagonal crystals with standard deviations of the lattice parameter below 1%. The periodic arrangement within the superlattices leads to new well-defined collective plasmon-polariton modes. The general level of achieved superlattice quality will be of benefit for a broad range of applications, ranging from fundamental studies of light-matter interaction to optical metamaterials and substrates for surface-enhanced spectroscopies.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

mentioning

confidence: 99%

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confidence: 99%

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Structural order in plasmonic superlattices

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High‐Performance Self‐Driven Polarization‐Sensitive Imaging Photodetectors based on Fully Depleted T‐MoSe₂/GeSe/B‐MoSe₂ Van der Waals Dual‐Heterojunction

An,

Pan,

Rong

et al. 2024

Adv Funct Materials

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New 2D materials with low‐symmetry structures aroused great interest in developing monolithic polarization‐sensitive photodetectors with small volumes, which can provide a new degree of freedom for more information in night, fog, and smoke environments. However, at least half of them presented a small anisotropy with an anisotropic factor (≈2) of photocurrent up to now. Herein, after systematic investigation of the optical anisotropies of GeSe nanosheets, a novel self‐driven polarization‐sensitive imaging photodetector with excellent performance based on a Top‐MoSe2/GeSe/Bottom‐MoSe2 (T‐MoSe2/GeSe/B‐MoSe2) van der Waals dual‐heterojunction is proposed. Benefitting from the effective separation and shortening transmission distance of photocarriers by fully depleted Van der Waals dual‐heterojunction on both sides of in‐plane anisotropy of GeSe, the anisotropic photocurrent ratio (Imax/Imin) of T‐MoSe2/GeSe/B‐MoSe2 photodetector can reach as high as 12.5 (635 nm, 0 V). This value is 3.5‐fold higher than that of MoSe2/GeSe photodetector, and 7‐fold higher than that of the pristine GeSe photodetector in this work. The responsivity of the T‐MoSe2/GeSe/B‐MoSe2 photodetector (206 mA W−1, 0 V) is 5 times higher than that of the MoSe2/GeSe photodetector. In addition, the T‐MoSe2/GeSe/B‐MoSe2 photodetector exhibited a high light on/off ratio of 4 × 104 at 0 V. This work provides novel insights for developing high‐performance polarization‐sensitive imaging photodetectors.

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Copper‐Based Plasmonic Catalysis: Recent Advances and Future Perspectives

et al. 2021

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With the capability of inducing intense electromagnetic field, energetic charge carriers, and photothermal effect, plasmonic metals provide a unique opportunity for efficient light utilization and chemical transformation. Earth‐abundant low‐cost Cu possesses intense and tunable localized surface plasmon resonance from ultraviolet‐visible to near infrared region. Moreover, Cu essentially exhibits remarkable catalytic performance toward various reactions owing to its intriguing physical and chemical properties. Coupling with light‐harvesting ability and catalytic function, plasmonic Cu serves as a promising platform for efficient light‐driven chemical reaction. Herein, recent advancements of Cu‐based plasmonic photocatalysis are systematically summarized, including designing and synthetic strategies for Cu‐based catalysts, plasmonic catalytic performance, and mechanistic understanding over Cu‐based plasmonic catalysts. What's more, approaches for the enhancement of light utilization efficiency and construction of active centers on Cu‐based plasmonic catalysts are highlighted and discussed in detail, such as morphology and size control, regulation of electronic structure, defect and strain engineering, etc. Remaining challenges and future perspectives for further development of Cu‐based plasmonic catalysis are also proposed.

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Deep strong light–matter coupling in plasmonic nanoparticle crystals

Cited by 203 publications

References 47 publications

Structural order in plasmonic superlattices

Structural order in plasmonic superlattices

High‐Performance Self‐Driven Polarization‐Sensitive Imaging Photodetectors based on Fully Depleted T‐MoSe₂/GeSe/B‐MoSe₂ Van der Waals Dual‐Heterojunction

Copper‐Based Plasmonic Catalysis: Recent Advances and Future Perspectives

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Deep strong light–matter coupling in plasmonic nanoparticle crystals

Cited by 203 publications

References 47 publications

Structural order in plasmonic superlattices

Structural order in plasmonic superlattices

High‐Performance Self‐Driven Polarization‐Sensitive Imaging Photodetectors based on Fully Depleted T‐MoSe2/GeSe/B‐MoSe2 Van der Waals Dual‐Heterojunction

Copper‐Based Plasmonic Catalysis: Recent Advances and Future Perspectives

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High‐Performance Self‐Driven Polarization‐Sensitive Imaging Photodetectors based on Fully Depleted T‐MoSe₂/GeSe/B‐MoSe₂ Van der Waals Dual‐Heterojunction