Metallic Nanodot Arrays by Stencil Lithography for Plasmonic Biosensing Applications

Vazquez-Mena, Oscar; Sannomiya, Takumi; Villanueva, Luis Guillermo; Vörös, János; Brugger, Juergen

doi:10.1021/nn1019253

Cited by 93 publications

(89 citation statements)

References 55 publications

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“…These attractive properties of the SPs have found application in a wide variety of fields, that is from medical applications, such as bio-sensing 4 and cancer therapy 5 , to plasmonic waveguiding 6 . However, the experimental mapping of SPs on the nanoscale using light remains an inherently difficult task owing to the diffraction limit.…”

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confidence: 99%

Extremely confined gap surface-plasmon modes excited by electrons

et al. 2014

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High-spatial and energy resolution electron energy-loss spectroscopy (EELS) can be used for detailed characterization of localized and propagating surface-plasmon excitations in metal nanostructures, giving insight into fundamental physical phenomena and various plasmonic effects. Here, applying EELS to ultra-sharp convex grooves in gold, we directly probe extremely confined gap surface-plasmon (GSP) modes excited by swift electrons in nanometre-wide gaps. We reveal the resonance behaviour associated with the excitation of the antisymmetric GSP mode for extremely small gap widths, down to B5 nm. We argue that excitation of this mode, featuring very strong absorption, has a crucial role in experimental realizations of non-resonant light absorption by ultra-sharp convex grooves with fabricationinduced asymmetry. The occurrence of the antisymmetric GSP mode along with the fundamental GSP mode exploited in plasmonic waveguides with extreme light confinement is a very important factor that should be taken into account in the design of nanoplasmonic circuits and devices.

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confidence: 99%

Extremely confined gap surface-plasmon modes excited by electrons

et al. 2014

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“…Over the past few years, significant advances in nanostencil lithography have enabled the routine fabrication of ~200 nm feature sizes 6 . However, the inability of nanostencil lithography to fabricate features with nanometer precision has significantly limited its utility.…”

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confidence: 99%

“…3a,b). However, small gold particles, attributed to surface diffusion of gold following deposition, are visible 6,33 . If needed, previous reports have demonstrated the ability to selectively remove these smaller gold particles with a short dry etch 34 .…”

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confidence: 99%

High resolution fabrication of nanostructures using controlled proximity nanostencil lithography

Jain

Aernecke

Liberman

et al. 2014

Applied Physics Letters

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Nanostencil lithography has a number of distinct benefits that make it an attractive nanofabrication processes, but the inability to fabricate features with nanometer precision has significantly limited its utility. In this paper, we describe a nanostencil lithography process that provides sub-15 nm resolution even for 40-nm thick structures by using a sacrificial layer to control the proximity between the stencil and substrate, thereby enhancing the correspondence between nanostencil patterns and fabricated nanostructures. We anticipate that controlled proximity nanostencil lithography will provide an environmentally stable, clean, and positive-tone candidate for fabrication of nanostructures with high-resolution.Significant advances in device physics across optical, electrical, and magnetic modalities have been enabled by the ability to fabricate structures with nanoscale precision. There is currently a large variety of top-down nanostructure fabrication methods available, such as electron beam lithography 1 ,

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“…SPPs have played a significant role in numerous areas, ranging from spectroscopy [3], biomedical sensing [4], photovoltaics [5], to integrated optical devices [6,7]. Because of highly confined and enhanced field, SPPs have been considered as a promising candidate for ultrahigh compact and ultrafast information processing.…”

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confidence: 99%

Surface Plasmon Polariton Unidirectional Nano-Launcher Based on the Strong Coupling Effects in an Asymmetric Optical Slot Nanoantenna Pair

et al. 2015

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We investigate the strong coupling effects in asymmetric optical slot nanoantenna pairs (AOSNPs) consisting of two parallelly positioned optical slot nanoantennas with different lengths and propose a surface plasmon polariton (SPP) unidirectional nano-launcher based on the strongly coupled AOSNPs (SCAOSNPs). Two subradiant modes can be excited in the SCAOSNPs, which originate from the hybridizations of the dipolar plasmon resonant modes in the two slot antennas. The subradiant modes give rise to large phase difference and nearly equal near-field electric field amplitudes between the two slot antennas, which can be used for unidirectional SPP launching and enable an ultra-compact nano-launcher. An extinction ratio up to 246 is achieved in the calculation via an SCAOSNP with a footprint of 170 nm by 260 nm on the surface of the gold film. The ultra-small footprint and tunable working wavelength enable the SCAOSNP important applications in future optical circuits and on-chip plasmonic devices.

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Metallic Nanodot Arrays by Stencil Lithography for Plasmonic Biosensing Applications

Cited by 93 publications

References 55 publications

Extremely confined gap surface-plasmon modes excited by electrons

Extremely confined gap surface-plasmon modes excited by electrons

High resolution fabrication of nanostructures using controlled proximity nanostencil lithography

Surface Plasmon Polariton Unidirectional Nano-Launcher Based on the Strong Coupling Effects in an Asymmetric Optical Slot Nanoantenna Pair

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