Quantitative Evaluation of Plasmon Enhanced Raman Scattering from Nanoaperture Arrays

Reilly, Thomas H.; Chang, Shun‐Ping; Corbman, Jordan D.; Schatz, George C.; Rowlen, Kathy L.

doi:10.1021/jp066802j

Cited by 83 publications

(75 citation statements)

References 45 publications

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“…The wavelengths of the Raman peaks are λ Raman1 = 857 nm and λ Raman2 = 896 nm. The LSPR resonance (λ LSPR ) spans across wavelengths that lie halfway between λ Ex and λ Raman , for both peaks, thereby simultaneously satisfying the approximate requirement (λ LSPR ≈(λ Ex + λ Raman )/2) for maximum SERS enhancement 1,28,29 . Figure 5c The plasmon resonances can be constructively or destructively influenced by cavity modes.…”

Section: Cavity-induced Enhancement and Deep Modulation Of Sersmentioning

confidence: 99%

Coupling of plasmonic and optical cavity modes in quasi-three-dimensional plasmonic crystals

et al. 2011

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The field of plasmonics has emerged as an interesting area for fundamental studies, with important application possibilities in miniaturized photonic components. Plasmonic crystals are of particular relevance because of large field enhancements and extraordinary transmission that arise from plasmonic interactions between periodic arrays of metallic elements. Here we report methods to enhance and modify the plasmonic resonances in such structures by strongly coupling them to optical modes of Fabry-Perot type cavities. First, we illustrate a type of plasmonic, narrow-band (~15 nm), high-contrast ( > 20 dB) absorber and an opto-fluidic modulator based on this component. second, we use optimized samples as substrates to achieve strong amplification ( > 350%) and modulation ( > 4×) of surface-enhanced Raman scattering from surface-bound monolayers. Cavity-coupling strategies appear to be useful not only in these two examples, but also in applications of plasmonics for optoelectronics, photovoltaics and related technologies.

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Section: Cavity-induced Enhancement and Deep Modulation Of Sersmentioning

confidence: 99%

Coupling of plasmonic and optical cavity modes in quasi-three-dimensional plasmonic crystals

et al. 2011

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“…The SP modes supported by these plasmonic structures were analyzed and confirmed numerically. This low-cost and efficient fabrication technique developed here substantially increases the attractiveness of using these plasmonic structures as nanophotonic elements in applications, including SP enhanced optical sensing and spectroscopy [42][43][44][45][46][57][58][59][60]. We believe that these novel plasmonic crystals may find application in biosensing, imaging, surface enhanced Raman scattering and optoelectronics.…”

Section: Discussionmentioning

confidence: 93%

Bottom-up fabrication approaches to novel plasmonic materials

et al. 2010

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Recent research effort towards developing novel metal nanoparticles (NPs) and their ordered arrays have been motivated by the emergence of plasmonics. In particular, tuning the size, morphology, composition and the separation of metal NPs has allowed us to engineer the collective properties of plasmonic crystals for specific applications. Here we present our recent development of bottom-up growth methods and demonstrate convenience for the preparation of such plasmonic materials. By implementation of physical, chemical, or electrochemical deposition of a metal in combination with micromolding on two-dimensional colloidal crystals, metallic NPs with a variety of morphologies can be created in an ordered lattice. The prepared novel plasmonic crystals could find applications in optics, optoelectronics, materials science, sensing and biophysics. surface plasmons, plasmonic crystal, colloidal crystal, transmission resonance, plasmonic sensor Citation: Chen Z, Zhan P, Dong W, et al. Bottom-up fabrication approaches to novel plasmonic materials. Metal nanoparticles (NPs) have been the subject of many detailed studies because of their distinct optical properties [1-3], which in most cases are associated with localized surface plasmon (SP) resonances [4]. When forming a periodic lattice, plasmon coupling between individual metal NPs may dramatically modify the optical responses [5]. To date, plasmonic materials have been explored for use in a wide range of applications such as waveguides, microscopes, light sources, lithographic tools, solar cells and biosensors [6-9].At present, plasmonic materials targeted for optical applications have mostly been manufactured by electron-beam lithography or focused ion-beam milling. However, these nanofabrication methods suffer the disadvantages of high fabrication cost and relatively long fabrication time, especially for large areas. Sophisticated chemical methods have been developed recently to routinely synthesize individual metallodielectric composite spheres with multi-shell structure [10-13] and metal colloids with controlled morphologies [14][15][16][17]. Nevertheless, it remains challenging to assemble metal NPs into an ordered lattice [8,[18][19][20] because of the difficulty in obtaining uniform NPs. Here, we summarize our recent development of bottom-up growth methods for the fabrication of plasmonic materials and demonstrate how large scale two-dimensional (2D) arrays of metallic NPs with controllable morphologies can be fabricated through colloidal crystal (CC) templating. In addition, our ability to control the shape of local elements allows for tunability of the optical response of the created plasmonic materials over the near-infrared (NIR) and visible spectrum range.

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“…The maximum SERS was observed for the array periodicity that provided the largest local light field strength at the excitation wavelength, as determined by numerical simulations. A quantitative eval- uation of the EF from nanoholes in silver was carried out and a 10 2 enhancement due exclusively to the SP excitation through nanoholes was obtained [198]. SERS from a thin metal film covered with a random distribution of 50 nm nanoholes (coverage equals to 100 holes/µm 2 ) have been reported [199] and the obtained SERS signal was comparable to that obtained from individual nanoparticles.…”

Section: Surface-enhanced Raman Scatteringmentioning

confidence: 83%

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

Gordon¹,

Brolo

Sinton

et al. 2010

Laser & Photonics Reviews

163

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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Quantitative Evaluation of Plasmon Enhanced Raman Scattering from Nanoaperture Arrays

Cited by 83 publications

References 45 publications

Coupling of plasmonic and optical cavity modes in quasi-three-dimensional plasmonic crystals

Coupling of plasmonic and optical cavity modes in quasi-three-dimensional plasmonic crystals

Bottom-up fabrication approaches to novel plasmonic materials

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

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