Polarized Plasmonic Enhancement by Au Nanostructures Probed through Raman Scattering of Suspended Graphene

Heeg, Sebastian; Fernández-García, Roberto; Oikonomou, Antonios; Schedin, F.; Narula, Rohit; Maier, Stefan A.; Vijayaraghavan, Aravind; Reich, Stéphanie

doi:10.1021/nl3041542

Cited by 145 publications

(210 citation statements)

References 39 publications

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“…Furthermore, the mechanism of SERS employing graphene has not been fully explored. Recently, increasing attention has turned to graphene-molecule 12,19,20 , moleculemetal 21,22 , and metal-grapheme [7][8][9][10][11] interactions; however, a great challenge remains and clarification is needed. Currently, little is known about the complex interaction among molecules, graphene, and metal processes.…”

Section: Introductionmentioning

confidence: 99%

Plasmon-driven reaction controlled by the number of graphene layers and localized surface plasmon distribution during optical excitation

et al. 2015

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Graphene-plasmonic hybrid platforms have attracted an enormous amount of interest in surface-enhanced Raman scattering (SERS); however, the mechanism of employing graphene is still ambiguous, so clarification about the complex interaction among molecules, graphene, and plasmon processes is urgently needed. We report that the number of graphene layers controlled the plasmon-driven, surface-catalyzed reaction that converts para-aminothiophenol (PATP)-to-p,p9-dimercaptoazobenzene (DMAB) on chemically inert, graphene-coated, silver bowtie nanoantenna arrays. The catalytic reaction was monitored by SERS, which revealed that the catalytic reaction occurred on the chemical inertness monolayer graphene (1G)-coated silver nanostructures. The introduction of 1G enhances the plasmon-driven surface-catalyzed reaction of the conversion of PATP-to-p,p9-DMAB. The chemical reaction is suppressed by bilayer graphene. In the process of the catalytic reaction, the electron transfer from the PATP molecule to 1G-coated silver nanostructures. Subsequently, the transferred electrons on the graphene recombine with the hot-hole produced by the localized surface plasmon resonance of silver nanostructures. Then, a couple of PATP molecules lost electrons are catalyzed into the p,p9-DMAB molecule on the graphene surface. The experimental results were further supported by the finite-difference time-domain method and quantum chemical calculations.

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Section: Introductionmentioning

confidence: 99%

Plasmon-driven reaction controlled by the number of graphene layers and localized surface plasmon distribution during optical excitation

et al. 2015

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“…The effectiveness of plasmonic nanostructures to enhance Raman scattering in graphene has been recently demonstrated by utilizing metal nanoparticles and patterned nanostructures on or in close proximity of a graphene sheet [16][17][18][19][20][21][22][23][24]. While reports of large Raman enhancement factors are abundant in the literature, nonetheless, little work has been done on distinguishing resonant pump absorption from resonant Stokes emission and investigating the peculiar effects of each individual mechanism on the Raman spectrum of graphene.…”

Section: Introductionmentioning

confidence: 99%

Enhanced Raman scattering in graphene by plasmonic resonant Stokes emission

Ghamsari¹,

Olivieri²,

Variola³

et al. 2014

Nanophotonics

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Exploiting surface plasmon polaritons to enhance interactions between graphene and light has recently attracted much interest. In particular, nonlinear optical processes in graphene can be dramatically enhanced and controlled by plasmonic nanostructures. This work demonstrates Raman scattering enhancement in graphene based on plasmonic resonant enhancement of the Stokes emission, and compares this mechanism with the conventional Raman enhancement by resonant pump absorption. Arrays of optical nanoantennas with different resonant frequency are utilized to independently identify the effects of each mechanism on Raman scattering in graphene via the measured enhancement factor and its spectral linewidth. We demonstrate that, while both mechanisms offer large enhancement factors (scattering cross-section gains of 160 and 20 for individual nanoantennas, respectively), they affect the graphene Raman spectrum quite differently. Our results provide a benchmark to assess and quantify the role and merit of each mechanism in surface-plasmon-mediated Raman scattering in graphene, and may be employed for design and realization of a variety of graphene optoelectronic devices involving nonlinear optical processes.

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“…As is known to all that the optical response of graphene is rather weak, the method to increase its absorption in the infrared part of the spectrum has become the key point for its optoelectronic applications 99, 108. Through electric gating the easy approach to switching the light can be taken.…”

Section: Plasmonic Tuning Of 2d Nanomaterialsmentioning

confidence: 99%

Plasmonics of 2D Nanomaterials: Properties and Applications

et al. 2017

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Plasmonics has developed for decades in the field of condensed matter physics and optics. Based on the classical Maxwell theory, collective excitations exhibit profound light‐matter interaction properties beyond classical physics in lots of material systems. With the development of nanofabrication and characterization technology, ultra‐thin two‐dimensional (2D) nanomaterials attract tremendous interest and show exceptional plasmonic properties. Here, we elaborate the advanced optical properties of 2D materials especially graphene and monolayer molybdenum disulfide (MoS2), review the plasmonic properties of graphene, and discuss the coupling effect in hybrid 2D nanomaterials. Then, the plasmonic tuning methods of 2D nanomaterials are presented from theoretical models to experimental investigations. Furthermore, we reveal the potential applications in photocatalysis, photovoltaics and photodetections, based on the development of 2D nanomaterials, we make a prospect for the future theoretical physics and practical applications.

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Polarized Plasmonic Enhancement by Au Nanostructures Probed through Raman Scattering of Suspended Graphene

Cited by 145 publications

References 39 publications

Plasmon-driven reaction controlled by the number of graphene layers and localized surface plasmon distribution during optical excitation

Plasmon-driven reaction controlled by the number of graphene layers and localized surface plasmon distribution during optical excitation

Enhanced Raman scattering in graphene by plasmonic resonant Stokes emission

Plasmonics of 2D Nanomaterials: Properties and Applications

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