Directional Plasmonic Excitation by Helical Nanotips

Singh, Leeju; Maccaferri, Nicolò; Garoli, Denis; Gorodetski, Yuri

doi:10.3390/nano11051333

Cited by 13 publications

(5 citation statements)

References 34 publications

(62 reference statements)

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“…The nanocone antenna can be fabricated following different strategies demonstrated during the last decade for nanoantennas preparation. 14,34,38,43,[57][58][59][60][61][62][63][64] In particular the Pt-C nanocone was fabricated using FIB milling (FEI Nanolab 600 dual beam) with Ga 2+ ion beam. A contact mode silicon AFM cantilever probe (MikroMasch CSC38-Al) with a long cone/pyramid was chosen as platform for the nanocone fabrication.…”

Section: Methodsmentioning

confidence: 99%

Light rectification with plasmonic nano-cone point contact-insulator-metal architecture

Mupparapu

Cunha

Tantussi

et al. 2023

Smart Materials for Opto-Electronic Applications

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Numerous efforts have been recently undertaken towards the development of rectifying devices operating at high frequencies especially dedicated to light harvesting and photo detection applications. To this end various rectification strategies have been implemented, such as laser-induced STM tunneling, metal-insulator-metal (MIM) travelling wave diodes, plasmonic nanogap optical antennas, antenna-diode coupled planar MIM, and MIM point-contact sharp-tip or whisker diodes. However, developing high frequency rectifying antennas (rectennas) remains a major technological challenge, as only recent progresses enabled the fabrication of efficient tunable nano-antennas at near infrared and visible frequencies. Here we report on a new type of rectenna based on plasmonic carrier generation. The proposed rectifying structure consists of a broadly resonant gold conical nano-tip antenna in contact with a metal-oxide/metal sample surface, forming a point-contact tunneling diode. The nano-sized antenna apex, designed to maximize the Surface Plasmon Polaritons (SPPs) damping, allows for an efficient power conversion from the light field into excited charges above the Fermi level, the latter ones collectable from the point-contact location through an electronic tunneling process. We demonstrated rectification operation at 280 THz with a power conversion efficiency one order of magnitude higher than the state-of-the-art which we attribute to efficient plasmonic carrier generation and collection.

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Section: Methodsmentioning

confidence: 99%

Light rectification with plasmonic nano-cone point contact-insulator-metal architecture

Mupparapu

Cunha

Tantussi

et al. 2023

Smart Materials for Opto-Electronic Applications

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“…The fabrication of three-dimensional conical nanopores involved adapting a technique tailored for creating 3D hollow nanostructures 8,10,38,[41][42][43][44][45][46][47][48][49][50][51][52][53][54][55][56][57] . By applying focused ion beam to a silicon nitride membrane coated with photoresist, a series of concentric disks were drilled resulting in hollow conical structures formed of hardened photoresist, as a result of secondary radiation and electron scattering from the ion beam.…”

Section: Nanopore Fabricationmentioning

confidence: 99%

Nanopores with customized 3D shape: tailored structures for nanoscale applications

Lanzavecchia,

Sapunova,

Douaki

et al. 2024

Nanophotonics X

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“…As regards the conical nanoantennas, the procedure is the same up to the creation of the free-standing Si3N4 membrane. The next steps follow procedures extensively demonstrated during the last decade 19,28,43,[58][59][60] . In brief, a layer of S1318 polymeric photoresist is spin-coated on the membrane side of the chip and the polymer is then allowed to cure by means of 3 min.…”

Section: Fabrication Of the Nanopores And Of The Nanoantennasmentioning

confidence: 99%

Electrical characterization of plasmonic nanopores excited with light

Doricchi

Lanzavecchia

Douaki

et al. 2023

Optical Sensors 2023

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Due to their superior properties in single-molecule detection, plasmonic and nanopore-based sensors have attracted research interest. In recent times, they have been combined in a single device, resulting in plasmonic nanopores-based sensors. These solid-state devices featured unprecedented enhancements in single-molecule and nanoparticle detection, optical spectroscopies and trapping, control of local temperature. In this context, we have investigated two kinds of nanostructures: plasmonic nanopores and plasmonic nanoantennas, both of which were fabricated on free-standing Si3N4 membranes. As regards the nanopores, we were able to prove that their plasmonic coating enhanced their conductance when illuminated at 631 nm. On the other side, antenna-shaped nanopores (i.e., nanoantennas) were fabricated via plasmonic photochemical deposition. At this regard, we demonstrated that it was possible to fabricate nanoantennas with different internal diameters by different time of plasmon-induced photochemical deposition of metal precursors at the free tip of the nanoantenna. In conclusion, we proved that it was possible to use each nanoantenna (i.e., each decreasing internal diameter) to detect the translocation of nanoparticles with correspondingly decreasing diameters or of DNA.

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Directional Plasmonic Excitation by Helical Nanotips

Cited by 13 publications

References 34 publications

Light rectification with plasmonic nano-cone point contact-insulator-metal architecture

Light rectification with plasmonic nano-cone point contact-insulator-metal architecture

Nanopores with customized 3D shape: tailored structures for nanoscale applications

Electrical characterization of plasmonic nanopores excited with light

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