Strong Polarized Enhanced Raman Scattering via Optical Tunneling through Random Parallel Nanostructures in Au Thin Films

Brolo, Alexandre G.; Arctander, Erin; Addison, Christopher J.

doi:10.1021/jp046045u

Cited by 29 publications

(39 citation statements)

References 38 publications

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“…The perpendicularly polarized light can efficiently excite the LSP modes in the transverse direction of the wires, maximizing the SERRS efficiency. 13,20 In order to confirm this polarization effect, three scratches in different directions were created in the same gold film, as depicted in Fig. 4(A) (scratches a, b and c).…”

Section: Polarization-dependent Serrs From Scratched Au Ultra-thin Filmsmentioning

confidence: 94%

“…13,17 In this case, a drop of 10 µM solution of oxa (from Lambdachrome) in HPLC-grade methanol (Aldrich) was added to the surface. Oxa is a common laser dye, with the main absorption band in the visible region around 620 nm.…”

Section: Methodsmentioning

confidence: 99%

“…Here we report a SERS substrate which is fabricated simply by creating a parallel scratch on gold films. 13 A substructure in the nanometric range is observed within the scratch, and surface-enhanced (resonance) Raman scattering [SE(R)S] from oxazine 720 (oxa) dye adsorbed on these substructures are easily observed. Moreover, the parallelism of the scratches introduced a 1-D order in this system; therefore, this substrate is an intermediate between a completely random system (gold colloids dispersed in glass) and the 2-D organized systems (gratings on gold, for instance).…”

Section: Introductionmentioning

confidence: 99%

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Surface‐enhanced Raman scattering from oxazine 720 adsorbed on scratched gold films

Brolo

Addison

2005

J Raman Spectroscopy

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Surface-enhanced Raman scattering (SERS) and surface-enhanced resonance Raman scattering (SERRS) from oxazine 720 (oxa) dye adsorbed on scratched gold films are reported. The SERS-active surface was prepared by performing a series of scratches in a 100 nm thick gold film deposited in glass. Atomic force microscopic imaging revealed a sub-structure within the scratches containing a set of parallel gold wires of different sizes and shapes. The 1-D order imposed by the parallelism between these wires is responsible for an interesting polarization effect observed in forward scattering experiments. It is shown that the maximum enhanced signal is observed when the polarization of the incident field is perpendicular to the direction of the scratches. This polarization discrimination may be useful in the design of SERS applications in chemical sensing and optical switching. Moreover, we also show that these scratched gold surfaces can be used as ordinary SERS substrates for experiments in backscattering using a common Raman microscope in non-resonance conditions with the excitation energy. This was accomplished by obtaining the electrochemical SERS of oxa in situ (under electrochemical control). The potential dependence of the SERS from oxa adsorbed on scratched Au is compared with previous results obtained with Ag electrodes.

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Section: Polarization-dependent Serrs From Scratched Au Ultra-thin Filmsmentioning

confidence: 94%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Surface‐enhanced Raman scattering from oxazine 720 adsorbed on scratched gold films

Brolo

Addison

2005

J Raman Spectroscopy

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“…Here the Raman enhancement was attributed to the high aspect ratio and anisotropic nature of substrate. 11,12 Furthermore, the comb nanostructures Cu lines were etching removed by HNO 3 solution and only low-k dielectrics remained. Comparing to stronger intensities of low-k dielectrics with Cu nanostructures (blue line), the intensities of low-k dielectrics without Cu nanostructures declines by about 80% (red line).…”

Section: Methodsmentioning

confidence: 99%

“…10 While for the aligned high-aspectratio nanowires or nanorods, the maximum enhanced Raman scattering intensity was observed in the polarization direction perpendicular to the long axis of the wires/rods. 11,12 In addition, the SP effect is highly geometry dependent. Generally, highly uniform and periodic nanostructures will greatly improve enhanced Raman scattering.…”

Section: Introductionmentioning

confidence: 99%

Enhancement of Raman signals from low-k dielectrics with angle-resolved light scattering on nanostructure patterned Cu/low-k interconnects of IC devices

Huang

Liu

Tan

et al. 2015

Journal of Vacuum Science &Amp; Technology A: Vacuum, Surfaces, and Films

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This letter reports the enhancement of Raman signals from low-k dielectric materials in the Cu/low-k interconnects of nanoscale integrated circuit (IC) devices. The Cu nanostructure pattern of the IC device acted as an active substrate for light scattering by the surface plasmon effect, enhancing the Raman signals observed from the low-k dielectric material of the device. The enhancement of the Raman signal of the low-k material was found to be strongly dependent on the incident angle of the incident laser light. A maximally enhanced Raman intensity was achieved when this angle was approximately 45° relative to the surface normal. Our findings are significant to the characterization of low-k materials and the monitoring of low-k reliability in leading edge semiconductor technologies with nanometer-scale structures.

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Multiwavelength Surface‐Enhanced Raman Spectroscopy Using Rainbow Trapping in Width‐Graded Plasmonic Gratings

Kazemi-Zanjani

Shayegannia

Prinja

et al. 2018

Advanced Optical Materials

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as plasmonic hot-spots. [2] The resulting spectroscopic technique, known as surface-enhanced Raman spectroscopy (SERS), [3] surpasses the inherently low sensitivity of Raman by counterbalancing its low scattering efficiency [4] through spatial localization of the sample molecules proximal to the hot-spots on SERS substrates. So far colloidal nanoparticles of various shapes and sizes have been extensively used in SERS; [5][6][7][8][9] however, the lack of control over their relative orientation and separation limits efficient plasmonic coupling therebetween. [10] While this issue is addressed in SERS substrates made of immobilized nanoparticles, [11][12][13][14] interparticle gaps in these substrates are typically optimized to generate maximum field confinement for single wavelengths. Broadband SERS substrates can be made by immobilizing a mixture of nanoparticles resonant over a range of laser wavelengths on surface plasmon polariton (SPP)-supporting thin films. [15,16] However, the magnitude of SERS signal enhancement and the broadband nature of such substrates remain highly dependent on the nanoparticle-film separation as well as the interparticle distances which are difficult to control in practice. More robust broadband SERS substrates have been recently fabricated by sputtering randomly sized silver nanoparticles on glass-silver-glass multilayered substrates, [17] yielding plasmonic resonances over the 400-1100 nm

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Strong Polarized Enhanced Raman Scattering via Optical Tunneling through Random Parallel Nanostructures in Au Thin Films

Cited by 29 publications

References 38 publications

Surface‐enhanced Raman scattering from oxazine 720 adsorbed on scratched gold films

Surface‐enhanced Raman scattering from oxazine 720 adsorbed on scratched gold films

Enhancement of Raman signals from low-k dielectrics with angle-resolved light scattering on nanostructure patterned Cu/low-k interconnects of IC devices

Multiwavelength Surface‐Enhanced Raman Spectroscopy Using Rainbow Trapping in Width‐Graded Plasmonic Gratings

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