Switchable Electrically Driven Optical Antenna Based on Ultrathin Amorphous Silica

Tang, Jibo; Hu, Huatian; He, Xiaobo; Xu, Yuhao; Zhang, Yuan; Guan, Zhiqiang; Zhang, Shunping; Xu, Hongxing

doi:10.1002/adom.202100191

Cited by 9 publications

(12 citation statements)

References 52 publications

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“…102 With the formation and erasure of the conductive filaments in the tunneling barrier, the junction presents two different conductive states, and the emission spectrum could vary in those two conditions with the change of conductive filaments in the junction. 102 However, this junction faces undesired stability problems due to the asymmetry of the structure. Later, in 2022, as shown in Figure 6c, Cheng et al demonstrated a similar exhibition of the combination of atomic-scale memristor and electrically driven light source.…”

Section: Actively Modulated Light-emitting Plasmonic Junctionsmentioning

confidence: 99%

“…The junction with two electrically reversible and well-distinguishable conductive states is named a memristor, and this junction can be used not only as a sensor but also as a memory element in optical neuron networks. In addition to the chemical reaction with other elements, the emission spectra and emission intensity of the optical antenna tunneling junction can also be actively adjusted by the electromigration of metal atoms . As shown in Figure b, an electrically switchable light source was demonstrated with Au/amorphous SiO x /Au tunneling junctions .…”

Section: Actively Modulated Light-emitting Plasmonic Junctionsmentioning

confidence: 99%

“…In addition to the chemical reaction with other elements, the emission spectra and emission intensity of the optical antenna tunneling junction can also be actively adjusted by the electromigration of metal atoms . As shown in Figure b, an electrically switchable light source was demonstrated with Au/amorphous SiO x /Au tunneling junctions . With the formation and erasure of the conductive filaments in the tunneling barrier, the junction presents two different conductive states, and the emission spectrum could vary in those two conditions with the change of conductive filaments in the junction .…”

Section: Actively Modulated Light-emitting Plasmonic Junctionsmentioning

confidence: 99%

“…As shown in Figure b, an electrically switchable light source was demonstrated with Au/amorphous SiO x /Au tunneling junctions . With the formation and erasure of the conductive filaments in the tunneling barrier, the junction presents two different conductive states, and the emission spectrum could vary in those two conditions with the change of conductive filaments in the junction . However, this junction faces undesired stability problems due to the asymmetry of the structure.…”

Section: Actively Modulated Light-emitting Plasmonic Junctionsmentioning

confidence: 99%

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Light-Emitting Plasmonic Tunneling Junctions: Current Status and Perspectives

Tang,

Guo,

et al. 2024

ACS Nano

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Quantum tunneling, in which electrons can tunnel through a finite potential barrier while simultaneously interacting with other matter excitation, is one of the most fascinating phenomena without classical correspondence. In an extremely thin metallic nanogap, the deep-subwavelength-confined plasmon modes can be directly excited by the inelastically tunneling electrons driven by an externally applied voltage. Light emission via inelastic tunneling possesses a great potential application for next-generation light sources, with great superiority of ultracompact integration, large bandwidth, and ultrafast response. In this Perspective, we first briefly introduce the mechanism of plasmon generation in the inelastic electron tunneling process. Then the state of the art in plasmonic tunneling junctions will be reviewed, particularly emphasizing efficiency improvement, precise construction, active control, and electrically driven optical antenna integration. Ultimately, we forecast some promising and critical prospects that require further investigation.

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Section: Actively Modulated Light-emitting Plasmonic Junctionsmentioning

confidence: 99%

Section: Actively Modulated Light-emitting Plasmonic Junctionsmentioning

confidence: 99%

Section: Actively Modulated Light-emitting Plasmonic Junctionsmentioning

confidence: 99%

Section: Actively Modulated Light-emitting Plasmonic Junctionsmentioning

confidence: 99%

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Light-Emitting Plasmonic Tunneling Junctions: Current Status and Perspectives

Tang,

Guo,

et al. 2024

ACS Nano

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“…[3][4][5][6][7] The LSPR of noble metal NPs has attracted tremendous interest due to their broad applications in sensing, [8] surfaceenhanced Raman scattering (SERS)/surface-enhanced florescence (SEF)/surface-enhanced IR absorption spectroscopy (SEIRA), [9][10][11][12][13] photothermal therapy (PTT), [14][15][16] and other related fields. [17][18][19][20] Currently, the synthesis of dimer-like Au-Au and Au-Ag nanostructures with conductive junctions was achieved by wielding AuNPs in assembled dimers and inducing the seeded growth of Ag islands on Au seeds. [44,48,49] By varying the area of the interface, the CTP absorptions were tunable in the Vis-NIR spectral range (≈1000 nm).…”

Section: Introductionmentioning

confidence: 99%

Modulating the Charge Transfer Plasmon in Bridged Au Core‐Satellite Homometallic Nanostructures

Wang

Jia

Zhang

et al. 2023

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Among plasmonic metals, Au is the best candidate for practical applications due to its intrinsic visible LSPR absorption, excellent stability and facile shape control and surface functionalization. [21][22][23][24][25] Generally, the LSPR of AuNPs is basically dependent on their shape, size, and structural aspect ratio (AR). [2,21,26,27] Much effort has been devoted to the controlled synthesis of AuNPs with various shapes. [28][29][30][31][32][33] To date, the synthesis of AuNPs in spheres, [34] cubes, [35] spikes, [36] rods, [37] plates, [38] bipyramids, [39] octahedra, [35] stars, [40] etc., has been extensively studied and is well controlled. As a result of this structural diversity, the LSPR absorptions of the different AuNPs are distributed widely within the visible and near-infrared (NIR) spectral range.Beyond shape control, structural hybridization is another effective way to tune the LSPR absorptions of Au nanostructures, which can lead to different plasmonic modes due to the intraparticle couplings of the elementary structural units. In general, plasmonic coupling can be divided into two types: capacitive and conductive couplings. Capacitive coupling, which is inversely proportional to the interparticle distance, usually occurs between separated AuNP units. When the AuNPs are linked by a conductive bridge, the charge transfer across the bridge induces the occurrence of the charge transfer plasmon (CTP) mode. [41][42][43][44] The resonance energy of the CTP is highly dependent on the conductance of the bridge, which determines the position of the CTP peaks.Recently, Duan, [45] Shi [46] , and Halas [47] reported Au matryoshka structures with tunable broad spectral absorptions in the NIR spectral range by engineering capacitive couplings among multiple Au shells. In Duan's and our recent works, the strong intraparticle capacitive couplings among the Au branches led to full spectrum absorption (black body) properties. [30,45] Effective conductive couplings were first achieved by introducing a conductive Au bridge between two Au nanodisks on a substrate by the lithography method, leading to CTP modes. By varying the conductance of the bridge, i.e., the different widths and lengths of the bridge, the CTP absorptions were readily tuned to within the middle IR spectral region.For the CTP structures synthesized by the lithography method, their applications are limited on substrate. To expand the study and application of CTP to colloidal systems, the solution phase synthesis of uniform nanostructures with tunable CTP is thus highly desired.The localized surface plasmon resonance (LSPR) is one of the important properties for noble metal nanoparticles. Tuning the LSPR on demand thus has attracted tremendous interest. Beyond the size and shape control, manipulating intraparticle coupling is an effective way to tailor their LSPR. The charge transfer plasmon (CTP) is the most important mode of conductive coupling between subunits linked by conductive bridges that are well studied for structures prepared on substrates b...

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Electrically‐Driven Light Source Embedded in a GaP Nanowaveguide for Visible‐Range Photonics on Chip

Lebedev,

Solomonov,

Fedorov

et al. 2024

Advanced Optical Materials

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The key components of photonic integrated circuits are nanoscale optica emitters and nanowaveguides. III‐V semiconductor nanostructures are considered as the most promising material platform for these components due to highly efficient luminescence and high refractive index, but the problem of emission coupling with waveguide is to be solved. In this work, the use of GaP nanowires (NWs) with different types of doping (GaP:Si or GaP:Be) is proposed as optical waveguides with directly integrated electrically‐driven light sources, solving the problem of emission‐to‐waveguide coupling. Single NWs are integrated with electrodes and pump electroluminescence by a tunnel junction allowing to study emission properties with nanoscale spatial resolution. Basing on the experiments on scanning tunnelling microscopy (STM), electron microscopy, time‐resolved photoluminescence micro‐spectroscopy, X‐ray diffraction, and STM‐induced electroluminescence, it is proven that GaP NWs exhibit different integrated light‐source on doping type of NWs. GaP:Be NWs contain inclusion of the crystalline wurtzite phase with a direct bandgap, and, thus, these NW regions can be considered as electrically‐driven nanoscale sources of light monolithically integrated into GaP NW‐based waveguides. Meanwhile, GaP:Si NWs work as optical waveguides capable of efficient light generation over the entire length of NW. The developed designs are promising for construction of integrated photonic circuits.

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Switchable Electrically Driven Optical Antenna Based on Ultrathin Amorphous Silica

Abstract: Research data are not shared.

Cited by 9 publications

References 52 publications

Light-Emitting Plasmonic Tunneling Junctions: Current Status and Perspectives

Light-Emitting Plasmonic Tunneling Junctions: Current Status and Perspectives

Modulating the Charge Transfer Plasmon in Bridged Au Core‐Satellite Homometallic Nanostructures

Electrically‐Driven Light Source Embedded in a GaP Nanowaveguide for Visible‐Range Photonics on Chip

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