Controlling plasmonic resonances in binary metallic nanostructures

Gu, Ying; Li, Jia; Martin, Olivier J. F.; Gong, Qihuang

doi:10.1063/1.3407527

Cited by 4 publications

(3 citation statements)

References 27 publications

(64 reference statements)

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“…Plasmonic photonic crystals [1][2][3][4][5] have been investigated extensively for exploiting special functions and new applications in optoelectronics and biosensors. Optical polarizers [6] and filters [7], optical switches [8,9], distributed feedback lasers [10] and sensors [11][12][13] have been demonstrated as successful applications of the metallic photonic crystals (MPCs) based on the interaction between the light wave and the particle plasmon resonance (PPR).…”

Section: Introductionmentioning

confidence: 99%

Direct writing of large-area plasmonic photonic crystals using single-shot interference ablation

Pang

2011

Nanotechnology

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We report direct writing of metallic photonic crystals (MPCs) through a single-shot exposure of a thin film of colloidal gold nanoparticles to the interference pattern of a single UV laser pulse before a subsequent annealing process. This is defined as interference ablation, where the colloidal gold nanoparticles illuminated by the bright interference fringes are removed instantly within a timescale of about 6 ns, which is actually the pulse length of the UV laser, whereas the gold nanoparticles located within the dark interference fringes remain on the substrate and form grating structures. This kind of ablation has been proven to have a high spatial resolution and thus enables successful fabrication of waveguided MPC structures with the optical response in the visible spectral range. The subsequent annealing process transforms the grating structures consisting of ligand-covered gold nanoparticles into plasmonic MPCs. The annealing temperature is optimized to a range from 250 to 300 °C to produce MPCs of gold nanowires with a period of 300 nm and an effective area of 5 mm in diameter. If the sample of the spin-coated gold nanoparticles is rotated by 90° after the first exposure, true two-dimensional plasmonic MPCs are produced through a second exposure to the interference pattern. Strong plasmonic resonance and its coupling with the photonic modes of the waveguided MPCs verifies the success of this new fabrication technique. This is the simplest and most efficient technique so far for the construction of large-area MPC devices, which enables true mass fabrication of plasmonic devices with high reproducibility and high success rate.

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Section: Introductionmentioning

confidence: 99%

Direct writing of large-area plasmonic photonic crystals using single-shot interference ablation

Pang

2011

Nanotechnology

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“…For binary three-strip nanostructures, near fields within the gaps and at the ends of nanostrips are greatly enhanced as a result of the influence of neighboring metallic material. Then, along each resonance branch, resonances in the dielectric permittivity region are mapped to the wavelength region of gold [31]. By adjusting material parameters ε 1 and ε 2 , the resonance wavelength is tuned from λ R = 500 nm to λ R = 1500 nm; whereas for a single nanostrip it is only at λ R = 630 nm.…”

Section: Plasmon Control Through Binary Metallic Nanostrcuturesmentioning

confidence: 99%

“…The interplay of SPRs within metallic nanoparticles with different material parameters has been studied [30]. In addition to using the geometry and arrangement of nanostructures to adjust resonances, the use of their material parameters to control their plasmonic properties has also been proposed [31]. In particular, when both kinds of nanostructures are metallic, their plasmonic properties are greatly modified due to the existence of free electrons in the neighboring metal.…”

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confidence: 99%

Solving surface plasmon resonances and near field in metallic nanostructures: Green’s matrix method and its applications

Martin

et al. 2010

Chin. Sci. Bull.

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With the development of nanotechnology, many new optical phenomena in nanoscale have been demonstrated. Through the coupling of optical waves and collective oscillations of free electrons in metallic nanostructures, surface plasmon polaritons can be excited accompanying a strong near field enhancement that decays in a subwavelength scale, which have potential applications in the surface-enhanced Raman scattering, biosensor, optical communication, solar cells, and nonlinear optical frequency mixing. In the present article, we review the Green's matrix method for solving the surface plasmon resonances and near field in arbitrarily shaped nanostructures and in binary metallic nanostructures. Using this method, we design the plasmonic nanostructures whose resonances are tunable from the visible to near-infrared, study the interplay of plasmon resonances, and propose a new way to control plasmonic resonances in binary metallic nanostructures. Near field concerns the evanescent wave bound to a nanostructured material surface that decays exponentially within a subwavelength [1,2]. At the metallic-dielectric interface or in the isolated metallic nanostructure, due to the existence of collective oscillations of free electrons, surface plasmons [3][4][5] are excited and are accompanied with the enhancement of optical near field. The large near field at the surface comes from the electric field carried by the metal, which is optimized by a proper matching of the geometry, the incident light, the metallic electric permittivity and dielectric environment. Nanostructures of noble metals strongly scatter and absorb light when the surface plasmon resonance (SPR) is excited [6]. The resonance frequency and intensity are dominated by the distribution of the polarization charge across the nanostructure [7]. This resonant enhancement has promoted many important applications, such as surface-enhanced Raman scattering [8], *Corresponding author (email: qhgong@pku.edu.cn) biosensors and nanometer plasmonic waveguides [9-12], optical antennas [13], solar cells [14,15], nonlinear optical frequency mixing [16][17][18] and so on.Currently, we can see a rapidly expanding array of metallic nanostructures. With the development of nanofabrication and nanolithography techniques, various metallic nanoparticles, such as nanospheres, nanoshells, nanorices, nanorings, nanostars, nanocages and nanotriangles, have been successfully fabricated [9]. For the nanostructures smaller than the electron mean-free path of the bulk metal, the dielectric permittivity becomes position-dependent. Generally, when the scale of nanostructure is larger than 10 nm, dielectric permittivity is approximately looked as position-independent. Nanorods and nanostrips have attracted particular attention because the longitudinal plasmon absorption bands are tunable with their aspect ratio changing from visible to near-infrared [19][20][21]. Xia and coworkers have managed to synthesize 100-nm-length nanobars and studied their scattering spectra [22]. Due to the adjustability

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Frequency-addressed tunable transmission in optically thin metallic nanohole arrays with dual-frequency liquid crystals

Hao

Zhao

Juluri

et al. 2011

Journal of Applied Physics

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Frequency-addressed tunable transmission is demonstrated in optically thin metallic nanohole arrays embedded in dual-frequency liquid crystals (DFLCs). The optical properties of the composite system are characterized by the transmission spectra of the nanoholes, and a prominent transmission peak is shown to originate from the resonance of localized surface plasmons at the edges of the nanoholes. An ∼17 nm shift in the transmission peak is observed between the two alignment configurations of the liquid crystals. This DFLC-based active plasmonic system demonstrates excellent frequency-dependent switching behavior and could be useful in future nanophotonic applications.

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Controlling plasmonic resonances in binary metallic nanostructures

Cited by 4 publications

References 27 publications

Direct writing of large-area plasmonic photonic crystals using single-shot interference ablation

Direct writing of large-area plasmonic photonic crystals using single-shot interference ablation

Solving surface plasmon resonances and near field in metallic nanostructures: Green’s matrix method and its applications

Frequency-addressed tunable transmission in optically thin metallic nanohole arrays with dual-frequency liquid crystals

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