Interaction and spectral gaps of surface plasmon modes in gold nano-structures

Kolomenskii, A.A.; Peng, Siying; Hembd, Jeshurun; Kolomenski, Andrei; Noel, John; Strohaber, James; Teizer, W.; Schuessler, H. A.

doi:10.1364/oe.19.006587

Cited by 6 publications

(5 citation statements)

References 47 publications

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“…It should be noted that the dark band in the transmission dispersion map is not indicative of anticrossing with the LSP mode. In the coupled mode model, when the coupling strength is larger than the material loss and radiation damping, the momentum of SPP ( k sp ) becomes a complex value that attenuates the transmission intensity as well as anticrossing at the intersection frequency. , In our samples, weak SPP modes from imperfect Au-glass point interfaces account for the observed weak anticrossing behavior. In addition, the split frequency interval is rather large (Δλ = 100 nm), which indicates that multiple dark modes of SPPs from the Au–glass interface are involved in this coupling process, as shown in the calculated mode lines (Figure a).…”

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confidence: 74%

Interfacial Mode Interactions of Surface Plasmon Polaritons on Gold Nanodome Films

Zhang

Park

et al. 2016

ACS Appl. Mater. Interfaces

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Hollow metallic nanodome structures were fabricated using anodized aluminum oxide (AAO) nanopores as deposition and sacrificial templates. Individual Au nanodomes inherit the unique shapes of the well-defined AAO membranes whose pedestal cells become square or hexagonal lattices with hemispheres in close proximity. Minimal contact between the hollow nanodomes and the glass substrate provide an identical dielectric medium across the film. The nanodome Au films support surface plasmon polaritons (SPPs) of strong air-Au and weak Au-glass modes in the light transmission dispersions. The mode crossings of distinct SPPs exhibit characteristic energy gaps, which depend on the periodic geometries of the nanostructures.

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confidence: 74%

Interfacial Mode Interactions of Surface Plasmon Polaritons on Gold Nanodome Films

Zhang

Park

et al. 2016

ACS Appl. Mater. Interfaces

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“…In Figure 2, we can observe anti-crossing feature between different modes and that the splitting related to the anti-crossing changes with . It has been shown earlier that the splitting in the energy and momentum could occur due to conservative and dissipative coupling, respectively [19]. As an example, we consider the case of interaction of (0,2) and (1,1) plasmon modes and how the interaction strength changes with .…”

Section: Angle  (Degrees)mentioning

confidence: 95%

“…It has been shown earlier that the splitting in the energy and momentum could occur due to conservative and dissipative coupling, respectively [19]. As an example, we consider the case of interaction of (0,2) and (1,1) plasmon modes and how the interaction strength changes with .…”

Section:  mentioning

confidence: 99%

“…In such a picture for the slab waveguide geometry (infinite in x-and y-directions and finite in z-direction) for modes propagating along x-direction, the in-plane and out-of-plane coupling constants are well known. For 1-D metal grating structure, such a model has been applied recently [19]. We apply the coupled mode theory to the three layer structure with 2D pattern on top by the following procedure.…”

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confidence: 99%

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Strong coupling of in-plane propagating plasmon modes and its control

Kasture¹,

Mandal²,

Gupta³

et al. 2013

Opt. Express

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:We show anti-crossings due to strong in-plane coupling of plasmon modes in dielectric-metaldielectric structure with top 2D dielectric pattern. Experimentally measured anti-crossing widths are compared with those calculated by coupled mode theory. It is shown that the coupling strength of the plasmon modes can be controlled by the orientation of the sample.Strong coupling of polariton modes results in anti-crossing or avoided crossings in the dispersion plots and are interesting for entanglement generation among others. Controlling the strength of coupling and thus the anti-crossing width or split gap between the two modes is of interest. For example, anti-crossings due to exciton-photon coupling in cavities and exciton-exciton coupling in coupled quantum dots are reported [1][2][3]. In the context of plasmons, coupled plasmons are studied where the coupling is between localized (particle) plasmons and propagating plasmons and coupling induced changes in dispersion in planar and corrugated structures [4][5][6][7]. In various sub-wavelength structures, these coupled localized and propagating plasmons are studied for basic physics as well as for different applications [8][9][10][11][12][13]. Also, in metal-dielectric-metal or dielectric-metal-dielectric structures when the middle layer is thin enough, coupling between plasmons at the top and bottom interfaces results in splitting of the modes to symmetric (short range) and anti-symmetric (long range) plasmon modes [14]. The general case of spp excitation in 1-d system when the grating vector is not contained in the plane of incidence has also been considered [15]. Such excitation geometry would allow the coupling of in-plane plasmons in case of two dimensional gratings. In this paper we report on strong coupling of in-plane propagating plasmons at the unpatterned dielectric-metal interface originating due to the 2D planar structure on the top in the non-conical excitation geometry. In addition, we show that the coupling strength and thus the anti-crossing gap (split) width can be controlled.The structure of the paper is as follows, we will first briefly describe the sample and the measurement geometry. Later, we show the experimental results on dispersion measurements which demonstrate anticrossing of plasmon modes and control of the splitting. We then quantitatively explain the splitting due to the coupling of plasmon modes followed by summary.Samples studied have dielectric-metal-dielectric layer structure with 2D air holes in dielectric pattern on top. On quartz substrates, Gold was deposited by sputtering followed by spin coating of Shipley's S1805

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“…The recent survey [1] presents the current state of knowledge in this field, which is still a subject of intensive research [2][3][4][5][6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Numerical analysis of transmission through a sub-wavelength metallic aperture or grating at visible and Terahertz wavelengths

Stolarek

Pastuszczak

Kotyński

2011

2011 13th International Conference on Transparent Optical Networks

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We analyse the coupling of THz radiation to a GaAs waveguide through a metallic grating with sub-wavelength slits. This result is compared to the coupling through a sub-wavelength-sized aperture in a chromium mask to a diffraction-free layered superlens at visible wavelengths. We demonstrate efficient coupling of a plane-wave to the multilayer. The mode resembles a ray -a term usually reserved for geometric-optics, and unknown to nanooptics. However, the width of the mode is sub-wavelength and the propagation direction is determined by the normal direction to the layer boundaries.

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Interaction and spectral gaps of surface plasmon modes in gold nano-structures

Cited by 6 publications

References 47 publications

Interfacial Mode Interactions of Surface Plasmon Polaritons on Gold Nanodome Films

Interfacial Mode Interactions of Surface Plasmon Polaritons on Gold Nanodome Films

Strong coupling of in-plane propagating plasmon modes and its control

Numerical analysis of transmission through a sub-wavelength metallic aperture or grating at visible and Terahertz wavelengths

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