Tunable Lattice Plasmon Resonances in 1D Nanogratings

Hua, Yi; Fumani, Ahmad K.; Odom, Teri W.

doi:10.1021/acsphotonics.8b01541

Cited by 47 publications

(40 citation statements)

References 26 publications

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“…The redshift of resonance peaks with the row spacing of Au nanoparticles under V-pol resembles the case that 1D nanogratings support a lower-energy mode at higher periodicities. [40] In another case of stretching along θ = 0°, the peak shift is smaller than those along θ = 90°, and a similar trend is observed under both vertical and horizontal polarization. It is worth mentioning that these spectra of stretched lattices are in excellent agreement with the simulation results (Figure S9, Supporting Information) and predefined lattices that correspond to these strained lattices in geometry (Figure S10, Supporting Information), suggesting that the stretched lattices are arranged exactly as calculated.…”

supporting

confidence: 54%

Strain‐Enabled Phase Transition of Periodic Metasurfaces

Liu

Wang

et al. 2021

Advanced Materials

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metasurfaces operate like their analogues of solid-state matters. [2] This understanding is incessantly nourishing the field of metasurfaces. Among them, periodic metasurfaces, where meta-atoms are arranged in periodic lattices, are one of the most prevailing structures (Figure S1, Supporting Information). [1,[7][8][9][10][11][12] Like natural crystals, periodic metasurfaces support 2D Bragg modes due to long-range coherent interactions between meta-atoms, leading to a strong dispersion of the effective permittivity or permeability, dependent on the geometry of lattices. As a result, metasurfaces with various 2D lattices offer a broad spectrum of interesting optical properties. The engineered dispersion yields high-Q (quality factor) resonance reflection and/ or absorption, and has enabled them to be ideal platforms for chemical sensing [11,13] and the coupling with absorptive and excitonic materials. [11,[14][15][16][17][18][19][20][21] Furthermore, the frequency of emerging resonance sensitively depends on lattices' geometry and periodicity, [8,13] offering accessible degrees of freedom to dynamically control the resonances of metasurfaces, and thus the regime of strong coupling. These degrees of freedom form the design principle for active metasurfaces, crucial for the photonic and communication systems. [22][23][24][25] Active metasurfaces are driven in various ways, including electrical gating, optical pumping, mechanical actuation, etc. [24,26,27] Deformable metasurfaces, whose optical responses are directly tuned through spatial re-arrangement of metaatoms by mechanical actuation, constitute a large category of active metasurfaces, [12,28] which have benefitted from the maturation of micro-electro-mechanical (MEMS) systems. These optical responses result in functional mechanical reconfigurable metasurfaces, such as adaptive metalens, [28,29] tunable holograms, [30] and variable gratings. [31] In particular, periodic lattices, which are inherently sensitive to the spacing between meta-atoms, have shown remarkable tuneability in structural colors and lasing wavelength under strains. [12,[32][33][34][35] Although the deformation of periodic metasurfaces under strain has been reported frequently, [12,[32][33][34] there remain no universal ways to describe strain-induced lattice deformation of periodic metasurfaces. As a result, one may neglect the accessible structures, and fail to discover interesting optical properties of metasurfaces under mechanical actuation.Here, we report a universal way to access arbitrary phases of periodic metasurfaces by applying strains. We introduce the crystallographic terminology of 2D Bravais lattices, [36] Phase transitions are universal in solid-state matters, as well as in periodic electromagnetic metasurfaces-the photonic analogues of crystals. Although such transitions dictate the properties of active metasurfaces, universal ways to describe the structure transition of periodic metasurfaces have not yet been established. Here, the authors report the strain-enabled phase tr...

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confidence: 54%

Strain‐Enabled Phase Transition of Periodic Metasurfaces

Liu

Wang

et al. 2021

Advanced Materials

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“…Although similar effect was reported by Rybin et al in photonic crystals with Fano resonance between continuum Mie scattering and a narrow Bragg band [22], it has not been reported in the field of SLRs yet. A typical example is the SLR supported by a 1D metal nanoridge grating, for which the transmittance spectra always exhibit a Fano-shaped dip as the incidence angle increases [23].…”

Section: Spectral Tunability and Band Reversal Effectmentioning

confidence: 99%

High-Q quadrupolar plasmonic lattice resonances in horizontal metal–insulator–metal gratings

et al. 2021

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We report narrow quadrupolar surface lattice resonances (SLRs) under normal incidence, and the observation, for the first time, of the band reversal effect of SLRs supported by a vertical metal-insulator-metal nanograting, which is embedded in a homogeneous dielectric environment. Simulation results show that under normal incidence, quadrupolar SLR with linewidth of 1 nm and high quality factor of 979 can be excited in the near-infrared regime, and that under oblique incidence, out-of-plane dipolar SLRs of relatively large quality factors (≥ 150) can be launched. By varying the incidence angle, the SLR wavelength can be continuously tuned over an extremely broadband range of 750 nm, covering most of the near-infrared regime, and the quality factor decreases exponentially. Remarkably, the resonance lineshape can also be dynamically tuned from an asymmetric Fano-shaped dip to a peak, a dip/peak pair, and a perfect symmetric Lorentzian peak, suggesting the appearance of the band reversal effect. We expect the high-Q SLRs with broadband tunability and tunable lineshapes will find potential applications in enhanced nanoscale light-matter interactions in nanolasers, nonlinear optics and sensing.

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“…Both conditions can be overcome by utilizing SLRs instead of LSPRs for creating an optical feedback. The combination of elastomeric substrates and lattice resonances has been foremost studied by the group of Odom, who investigated the behavior of different lattice geometries prepared. Aside from this lithography‐based work, colloidal self‐assembly enables the preparation of plasmonic lattices on elastomers like PDMS.…”

Section: Mechanotunable Plasmonic Systemsmentioning

confidence: 99%

Mechanotunable Plasmonic Properties of Colloidal Assemblies

Brasse

Gupta

Schollbach

et al. 2019

Adv Materials Inter

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Noble metal nanoparticles can absorb incident light very efficiently due to their ability to support localized surface plasmon resonances (LSPRs), collective oscillations of the free electron cloud. LSPRs lead to strong, nanoscale confinement of electromagnetic energy which facilitates applications in many fields including sensing, photonics, or catalysis. In these applications, damping of the LSPR caused by inter‐ and intraband transitions is a limiting factor due to the associated energy losses and line broadening. The losses and broad linewidth can be mitigated by arranging the particles into periodic lattices. Recent advances in particle synthesis, (self‐)assembly, and fabrication techniques allow for the realization of collective coupling effects building on various particle sizes, geometries, and compositions. Beyond assemblies on static substrates, by assembling or printing on mechanically deformable surfaces a modulation of the lattice periodicity is possible. This enables significant alteration and tuning of the optical properties. This progress report focuses on this novel approach for tunable spectroscopic properties with a particular focus on low‐cost and large‐area fabrication techniques for functional plasmonic lattices. The report concludes with a discussion of the perspectives for expanding the mechanotunable colloidal concept to responsive structures and flexible devices.

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Tunable Lattice Plasmon Resonances in 1D Nanogratings

Cited by 47 publications

References 26 publications

Strain‐Enabled Phase Transition of Periodic Metasurfaces

Strain‐Enabled Phase Transition of Periodic Metasurfaces

High-Q quadrupolar plasmonic lattice resonances in horizontal metal–insulator–metal gratings

Mechanotunable Plasmonic Properties of Colloidal Assemblies

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