Ultrafast active plasmonics

MacDonald, Kevin F.; Sámson, Z.L.; Stockman, Mark I.; Zheludev, Nikolay I.

doi:10.1038/nphoton.2008.249

Cited by 807 publications

(613 citation statements)

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“…1 The localized surface plasmon resonances sustained by metallic nanoparticles 2 have found widespread use in applications ranging from molecular spectroscopy 3 and chemical sensing, 4 to photocatalysis 5 and photovoltaics. 6 Applications of plasmons in next generation nanoelectronics 7 and quantum information technology 8,9 have also been envisioned. Advances in nanofabrication techniques and transmission electron microscopy have recently enabled the study of plasmon excitations on a subnanometer length scale.…”

Section: Introductionmentioning

confidence: 99%

Visualizing hybridized quantum plasmons in coupled nanowires: From classical to tunneling regime

et al. 2013

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We present full quantum mechanical calculations of the hybridized plasmon modes of two nanowires at small separation, providing real space visualization of the modes in the transition from the classical to the quantum tunneling regime. The plasmon modes are obtained as certain eigenfunctions of the dynamical dielectric function which is computed using time dependent density functional theory (TDDFT). For freestanding wires, the energy of both surface and bulk plasmon modes deviate from the classical result for low wire radii and high momentum transfer due to effects of electron spill-out, non-local response, and coupling to single-particle transitions. For the wire dimer the shape of the hybridized plasmon modes are continuously altered with decreasing separation, and below 6 Å the energy dispersion of the modes deviate from classical results due to the onset of weak tunneling. Below 2-3 Å separation this mode is replaced by a charge-transfer plasmon which blue shifts with decreasing separation in agreement with experiment, and marks the onset of the strong tunneling regime.

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Section: Introductionmentioning

confidence: 99%

Visualizing hybridized quantum plasmons in coupled nanowires: From classical to tunneling regime

et al. 2013

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“…Various types of compact modulators that utilize SPPs have been proposed [1,[9][10][11][12][13][14]. Both phase and absorption modulations have been exploited to achieve high speed and low footprint of a modulator along with the CMOS-compatible technology.…”

Section: Introductionmentioning

confidence: 99%

Plasmonic modulator optimized by patterning of active layer and tuning permittivity

Babicheva

Lavrinenko

2012

Optics Communications

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Abstract.We study an ultra-compact plasmonic modulator that can be applied in photonic integrated circuits. The modulator is a metal-insulator-metal waveguide with an additional ultra-thin layer of indium tin oxide (ITO). Bias is applied to the multilayer core by means of metal plates that serve as electrodes. External field changes carrier density in the ultra-thin ITO layer, which influences the permittivity. The metal-insulator-metal system possesses a plasmon resonance, and it is strongly affected by changes in the permittivity of the active layer. To improve performance of the structure we propose several optimizations. We examine influence of the ITO permittivity on the modulator's performance and point out appropriate values. We analyze eigenmodes of the waveguide structure and specify the range for its efficient operation. We show that substituting the continuous active layer by a one-dimension periodic stripes increases transmittance through the device and keeps the modulator's performance at the same level. The dependence on the pattern size and filling factor of the active material is analyzed and optimum parameters are found. Patterned ITO layers allow us to design a Bragg grating inside the waveguide. The grating can be turned on and off, thus modulating reflection from the structure. The considered structure with electrical control possesses a high performance and can efficiently work as a plasmonic component in nanophotonic architectures.

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“…11 Plasmonics holds promise as a new paradigm for achieving truly nanoscale, ultrafast optical devices in integrated photonic circuits. [12][13][14] Active control of the properties of electromagnetic resonances in nanoantennas is generally considered as an important landmark toward the development of transistor-type nanodevices capable of manipulating the flow and emission of light.…”

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confidence: 99%

Interference, Coupling, and Nonlinear Control of High-Order Modes in Single Asymmetric Nanoantennas

Abb

Wang²,

Albella

et al. 2012

ACS Nano

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We investigate theoretically and experimentally the structure of plasmonic modes in individual asymmetric dimer antennas. Plasmonic near-field coupling of high-order modes results in hybridization of bright and dark modes of the individual nanorods leading to an anticrossing of the coupled resonances. For two bright modes, hybridization results in a capacitive redshift and superradiant broadening. We show that the properties of asymmetric dimers can be used for nonlinear control of spectral modes and demonstrate such a nonlinear effect by measuring the modulation of a hybrid asymmetric dimer -ITO antenna. With use of full electrodynamical calculations we find that the properties of the near-field nonlinear responses are distinctly different from the far field, which opens up new routes for nonlinear control of plasmonic nanosystems.

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Ultrafast active plasmonics

Cited by 807 publications

References 30 publications

Visualizing hybridized quantum plasmons in coupled nanowires: From classical to tunneling regime

Visualizing hybridized quantum plasmons in coupled nanowires: From classical to tunneling regime

Plasmonic modulator optimized by patterning of active layer and tuning permittivity

Interference, Coupling, and Nonlinear Control of High-Order Modes in Single Asymmetric Nanoantennas

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