Compound resonance-induced coupling effects in composite plasmonic metamaterials

Farhang, Arash; Ramakrishna, S. Anantha; Martin, Olivier J. F.

doi:10.1364/oe.20.029447

Cited by 12 publications

(16 citation statements)

References 46 publications

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“…56 Additionally, compound modes generated because of the interaction between localized and propagating plasmons in a periodic gold grating array placed close to a thin gold film have also been investigated recently. [59][60][61][62] These resonances exhibit both characteristics of localized and propagating surface plasmons, which lead to a high sensitivity to the refractive index variations.…”

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confidence: 99%

Cavity-Coupled Plasmonic Device with Enhanced Sensitivity and Figure-of-Merit

et al. 2015

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Using full-wafer processing, we demonstrate a sophisticated nanotechnology for the realization of an ultrahigh sensitive cavity-coupled plasmonic device that combines the advantages of Fabry-Perot microcavities with those of metallic nanostructures. Coupling the plasmonic nanostructures to a Fabry-Perot microcavity creates compound modes, which have the characteristics of both Fabry-Perot and localized surface plasmon resonance (LSPR) modes, boosting the sensitivity and figure-of-merit of the structure. The significant trait of the proposed device is that the sample to be measured is located in the substrate region and is probed by the compound modes. It is demonstrated that the sensitivity of the compound modes is much higher than that of LSPR of plasmonic nanostructures or the pure Fabry-Perot modes of the optical microcavity. The response of the device is also investigated numerically and the agreement between measurements and calculations is excellent. The key features of the device introduced in this work are applicable for the realization of ultrahigh sensitive plasmonic devices for biosensing, optoelectronics, and related technologies.

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Cavity-Coupled Plasmonic Device with Enhanced Sensitivity and Figure-of-Merit

et al. 2015

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“…The novelty of this paper is the numerical and experimental demonstration of such a system that can also support new compound plasmonic resonances, i.e., resonances exhibiting both a localized and propagative response. 52 The studied interaction between a metallic grating and a continuous film demonstrates the formation of such resonances, where the field not only propagates along the continuous surface of the film, but is also localized around the grating elements. In addition, unlike grating-assisted excitation of SPPs where it is primarily the periodicity that determines the resonance frequency, here the width of grating elements also plays a critical role in determining the resonance frequency, just as is the case for LSPs.…”

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confidence: 99%

Large-scale sub-100 nm compound plasmonic grating arrays to control the interaction between localized and propagating plasmons

et al. 2014

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Compound plasmonic resonances arise due to the interaction between discrete and continuous metallic nanostructures. Such combined nanostructures provide a versatility and tunability beyond that of most other metallic nanostructures. In order to observe such resonances and their tunability, multiple nanostructure arrays composed of periodic metallic gratings of varying width and an underlying metallic film should be studied. Large-area compound plasmonic structures composed of various Au grating arrays with sub-100 nm features spaced nanometers above an Au film were fabricated using extreme ultraviolet interference lithography. Reflection spectra, via both numerical simulations and experimental measurements over a wide range of incidence angles and excitation wavelengths, show the existence of not only the usual propagating and localized plasmon resonances, but also compound plasmonic resonances. These resonances exhibit not only propagative features, but also a spectral evolution with varying grating width. Additionally, a reduction of the width of the grating elements results in coupling with the localized dipolar resonance of the grating elements and thus plasmon hybridization. This newly acquired perspective on the various interactions present in such a plasmonic system will aid in an increased understanding of the mechanisms at play when designing plasmonic structures composed of both discrete and continuous elements.

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“…This structured metal-dielectric-metal layer system can also act as a nonlinear absorber when interacting resonantly with a high power laser [16]. Farhang et.al, [6] reported compound plasmon resonances due to coupling in a metallic nanograting placed close to a thin gold film. Wang and co-workers reported numerical results on broadband metal-dielectric tri-layer MPA for optical region.…”

Section: Introductionmentioning

confidence: 99%

Resonant enhancement of Raman scattering in metamaterials with hybrid electromagnetic and plasmonic resonances

Guddala

Rao

Ramakrishna

2016

J. Opt.

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A tri-layer metamaterial perfect absorber of light, consisting of (Al/ZnS/Al) films with the top aluminium layer patterned as an array of circular disk nanoantennas, is investigated for resonantly enhancing Raman scattering from C-60 fullerene molecules deposited on the metamaterial. The metamaterial is designed to have resonant bands due to plasmonic and electromagnetic resonances at the Raman pump frequency (725 nm) as well as Stokes emission bands. The Raman scattering from C60 on the metamaterial with resonantly matched bands is measured to be enhanced by an order of magnitude more than from C60 on metamaterials with off-resonant absorption bands peaked at 1090 nm. The Raman pump is significantly enhanced due to the resonance with a propagating surface plasmon band, while the highly impedance matched electromagnetic resonance is expected to couple out the Raman emission efficiently.The nature and hybridization of the plasmonic and electromagnetic resonances to form compound resonances are investigated by numerical simulations.

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Compound resonance-induced coupling effects in composite plasmonic metamaterials

Cited by 12 publications

References 46 publications

Cavity-Coupled Plasmonic Device with Enhanced Sensitivity and Figure-of-Merit

Cavity-Coupled Plasmonic Device with Enhanced Sensitivity and Figure-of-Merit

Large-scale sub-100 nm compound plasmonic grating arrays to control the interaction between localized and propagating plasmons

Resonant enhancement of Raman scattering in metamaterials with hybrid electromagnetic and plasmonic resonances

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