Polarization-tunable plasmon-enhanced extraordinary transmission through metallic films using asymmetric cruciform apertures

Roth, Ryan M.; Panoiu, Nicolae C.; Adams, Matthew; Dadap, Jerry I.; Osgood, Richard M.

doi:10.1364/ol.32.003414

Cited by 28 publications

(21 citation statements)

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“…In the transmission spectra two global maxima are present; one, at 4.2 µm occurs when the polarization angle θ = 0 and another, at 5.5 µm, when θ = 90 ○ . These global maxima are due to the excitation of two LSP modes, which are supported by the apertures [23,24]. In the reflection spectra the excitation of the plasmon modes produces global minima.…”

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confidence: 98%

“…1). These nanostructures have been studied extensively [23,24], one of their defining properties being that, analogous to anisotropic molecules, their polarizability strongly depends on the polarization of the incident wave. These plasmonic metamolecules can therefore be tailored to different molecular resonances not only because the resonance frequencies of LSPs are strongly dependent upon their size and shape but, more importantly, because of their intrinsic optical anisotropy.…”

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confidence: 99%

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Fano Resonance Resulting from a Tunable Interaction between Molecular Vibrational Modes and a Double Continuum of a Plasmonic Metamolecule

et al. 2013

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Coupling between tuneable broadband modes of an array of plasmonic metamolecules and a vibrational mode of carbonyl bond of poly(methyl methacrylate) is shown experimentally to produce a Fano resonance, which can be tuned in situ by varying the polarization of incident light. The interaction between the plasmon modes and the molecular resonance is investigated using both rigorous electromagnetic calculations and a quantum mechanical model describing the quantum interference between a discrete state and two continua. The predictions of the quantum mechanical model are in good agreement with the experimental data and provide an intuitive interpretation, at the quantum level, of the plasmon-molecule coupling.PACS numbers: 73.20. Mf, 78.67.Pt, 78.68.+m, 42.82.Et, The spectral control of optical absorption in metallic nanostructures has generated rapidly growing interest, both as a means for studying light-matter interaction at the deep-subwavelength scale and to develop new functional nanomaterials. Plasmonic materials provide an ideal platform for achieving enhanced optical interaction at the nanoscale as their primary building blocks consist of highly resonant particles, which strongly confine and enhance the optical field [1][2][3][4]. These properties are commonly employed to increase the optical coupling between plasmonic structures and an optically active medium, enabling many applications, including surface-enhanced Raman spectroscopy [5,6], surface-enhanced infrared absorption spectroscopy [7,8], enhancement of the excitation rate and fluorescence of quantum dots (QDs) and molecules [9][10][11], chemical sensing [12,13], and biodetection [14,15]. One effective approach for tailoring the shape of plasmonic resonances is the Fano interference between a narrow (discrete) resonance and a broad (continuous) one [16][17][18][19].A defining feature of Fano resonances is their pronounced spectral asymmetry. This can be exploited in applications that require high sensitivity to changes in the environment. Fano resonances in plasmonic systems can also provide physical insights into light-matter interaction at the nanoscale, as they are primarily the result of short-range, near-field interactions. Although Fano resonances in plasmonic systems have been chiefly investigated in a classical context, they can also be observed in quantum systems consisting of QDs, atoms, or molecules coupled to metallic nanoparticles [14,[20][21][22]. In this case the Fano resonance results from the interaction between a quantum discrete state and a classical continuum (localized or extended) plasmon mode. In many applications it is desirable to tune the strength of the interaction between the discrete and continuous state, and consequently dynamically change the shape of Fano resonances. However, since the materials and geometrical parameters of a plasmonic structure are difficult to control at the nanoscale, a convenient way to achieve optical tunability has not yet been attained.In this Letter we demonstrate experimentally and theoretica...

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Fano Resonance Resulting from a Tunable Interaction between Molecular Vibrational Modes and a Double Continuum of a Plasmonic Metamolecule

et al. 2013

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“…Similar to rectangular holes, crossshaped holes have shown even greater resonance enhancements for similar hole-area, but without the polarization dependence [104]. Cross-shaped holes also allow for changing the polarization properties along both directions by varying the different arms of the cross [105]. The different responses of circle and cross aperture arrays due to their shape-dependent local resonances were compared re- cently in infrared experiments [106] (as well as for stacked aperture arrays).…”

Section: Hole-shape: Basis Effectsmentioning

confidence: 99%

Resonant optical transmission through hole‐arrays in metal films: physics and applications

Gordon¹,

Brolo

Sinton

et al. 2010

Laser & Photonics Reviews

162

104

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Extraordinary optical transmission through an array of holes in a metal film was reported by Ebbesen and coworkers in 1998. Since that work there has been abundant research activity aimed at understanding the physics and at the development of the many applications associated with this phenomenon, hence the topic of this review. The study of hole-arrays in a metal is not new -theoretical contributions on a small-hole array date back to Lord Rayleigh's description of Wood's anomaly in 1907 and there has been considerable research on metal meshes and holearrays since 1962. Bethe's theory, adapted to treat hole-arrays, is the simplest theoretical description of the transmission resonance. Following a description of this basic theory, we present the research on the additional effects from variations in real metal properties at different wavelengths, film thickness, holeshape and lattice configuration. The many promising applications being developed using hole-arrays are examined, including polarization control, filtering, switching, nonlinear optics, surface plasmon resonance sensing, surface-enhanced fluorescence, surface-enhanced Raman scattering, absorption spectroscopy, and quantum interactions. Finally, the various approaches, developments in hole-array fabrication, and integration of hole-arrays into devices are described. (top left) Schematic of resonant transmission through nanohole array using scanning electron microscope image of as-fabricated sample. (top right) Microfluidic chip incorporating nanohole arrays. (bottom) Composite image of array of nanohole arrays used as sensors in a immunoassay-like microfluidic device, showing (left to right) schematic of microfluidic layout, microscope image of arrays in microfluidic channels, and laser transmission modified by adsorbed molecules.

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“…Thus, several designs of graphene based polarization converters operating in transmission or reflection have been proposed and used to demonstrate the conversion of the polarization state of light from linearly polarized to a different linearly polarized state or to right-and left-circularly polarized (RCP, LCP) light [30][31][32][33][34][35][36][37][38][39]. In addition, polarization converters based on metallic structures have also been demonstrated [40][41][42][43][44][45][46][47][48][49], although they are bulkier and have a significantly larger size as compared to similar devices based on graphene. Despite this recent progress, a key functionality still has to be implemented in reliable devices, namely tunable and ultrafast controllable THz polarization converters.…”

Section: Introductionmentioning

confidence: 99%

Polarization control using passive and active crossed graphene gratings

You

Panoiu

2018

Opt. Express

Self Cite

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Graphene gratings provide a promising route towards the miniaturization of THz metasurfaces and other photonic devices, chiefly due to remarkable optical properties of graphene. In this paper, we propose novel graphene nanostructures for passive and active control of the polarization state of THz waves. The proposed devices are composed of two crossed graphene gratings separated by an insulator spacer. Because of specific linear and nonlinear properties of graphene, these optical metasurfaces can be utilized as ultrathin polarization converters operating in the THz frequency domain. In particular, our study shows that properly designed graphene polarizers can effectively select specific polarization states, their thickness being about a tenth of the operating wavelength and size more than 80× smaller than that of similar metallic devices.Equally important, we demonstrate that the nonlinear optical properties of graphene can be utilized to actively control the polarization state of generated higher harmonics.

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Polarization-tunable plasmon-enhanced extraordinary transmission through metallic films using asymmetric cruciform apertures

Cited by 28 publications

References 0 publications

Fano Resonance Resulting from a Tunable Interaction between Molecular Vibrational Modes and a Double Continuum of a Plasmonic Metamolecule

Fano Resonance Resulting from a Tunable Interaction between Molecular Vibrational Modes and a Double Continuum of a Plasmonic Metamolecule

Resonant optical transmission through hole‐arrays in metal films: physics and applications

Polarization control using passive and active crossed graphene gratings

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