Localization of Near-Field Resonances in Bowtie Antennae: Influence of Adhesion Layers

Jiao, Xiaojin; Goeckeritz, Jeremy; Blair, Steve; Oldham, Mark

doi:10.1007/s11468-008-9075-x

Cited by 76 publications

(74 citation statements)

References 41 publications

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“…This was shown in the simulations with a thicker Cr layer. This effect was also recently reported by Jiao et al 54 who did simulations of near-field resonances in bowtie antennae to study the influence of the adhesion layers.…”

Section: Resultssupporting

confidence: 79%

Chemically Tuning the Localized Surface Plasmon Resonances of Gold Nanostructure Arrays

et al. 2009

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We report on chemical etching of ordered Au nanostructure arrays to continuously tune their localized surface plasmon resonances (LSPR). Real-time extinction spectra were recorded from both Au nanodisks and nanospheres immobilized on glass substrates when immersed in Au etchant. The time-dependent LSPR frequencies, intensities, and bandwidths were studied theoretically with discrete dipole approximations and the Mie solution, and they were correlated with the evolution of the etched Au nanostructures' morphology (as examined by atomic force microscopy). Since this chemical etching method can conveniently and accurately tune LSPR, it offers precise control of plasmonic properties and can be useful in applications such as surfaceenhanced Raman spectroscopy and molecular resonance spectroscopy.

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Section: Resultssupporting

confidence: 79%

Chemically Tuning the Localized Surface Plasmon Resonances of Gold Nanostructure Arrays

et al. 2009

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“…These spectra are seen to be in good agreement with the measured data. For the simulations we assumed that the chromium adhesion layer had oxidized to Cr 2 O 3 and used a frequency-independent refractive index of n a ¼ 2.2 þ 0.5i for the adhesion layer [44,45]. Also, we took the values of the refractive index of gold from [46] and used a 15-nm thickness for the discs to best match the resonant features in the measured curves.…”

Section: Metasurface Design and Experimentsmentioning

confidence: 99%

Bifacial Metasurface with Quadrupole Optical Response

et al. 2015

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We design, fabricate, and characterize a metasurface, whose multipole optical response depends significantly on the illumination direction. The metasurface is composed of gold-nanodisc dimers embedded in glass. In spite of their nanoscale size, the dimers exhibit a dominating electric-currentquadrupole response in a wide range of wavelengths around 700 nm when illuminated from one side, and a primarily electric-dipole response when illuminated from the opposite side. This leads to two consequences. First, the reflection coefficient of the metasurface considerably differs for the two sides of illumination. Second, quadrupole excitation results in a significant local enhancement of both electric and magnetic fields around the dimers. Our experimental spectroscopic data are in good agreement with simulations obtained using a multipole expansion model.

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“…[74,79] In our work, we typically employ a non-metallic adhesion layer that does not quench the plasmonic response to provide devices that are robust to the environments found in analytical applications. [83][84][85] Finally, a thin gold film is deposited on the patterned substrate either by electron beam evaporation to form a quasi 3D plasmonic crystal or by sputter deposition to form what we term a full 3D plasmonic crystal. The differences between ''quasi'' and ''full'' 3D plasmonic crystals will be made more clear below.…”

Section: Plasmonic Crystal Fabrication and General Characterizationmentioning

confidence: 99%

Functional Nanostructured Plasmonic Materials

et al. 2010

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Plasmonic crystals fabricated with precisely controlled arrays of subwavelength metal nanostructures provide a promising platform for sensing and imaging of surface binding events with micrometer spatial resolution over large areas. Soft nanoimprint lithography provides a robust, cost-effective method for producing highly uniform plasmonic crystals of this type with predictable optical properties. The tunable multimode plasmonic resonances of these crystals and their ability for integration into lab-on-a-chip microfluidic systems can both be harnessed to achieve exceptionally high analytical sensitivities down to submonolayer levels using even a common optical microscope, circumventing numerous technical limitations of more conventional surface plasmon resonance techniques. In this article, we highlight some recent advances in this field with an emphasis on the fabrication and characterization of these integrated devices and their demonstrated applications.

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Localization of Near-Field Resonances in Bowtie Antennae: Influence of Adhesion Layers

Cited by 76 publications

References 41 publications

Chemically Tuning the Localized Surface Plasmon Resonances of Gold Nanostructure Arrays

Chemically Tuning the Localized Surface Plasmon Resonances of Gold Nanostructure Arrays

Bifacial Metasurface with Quadrupole Optical Response

Functional Nanostructured Plasmonic Materials

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