Plasmonic enhancements of photoluminescence in hybrid Si nanostructures with Au fabricated by fully top-down lithography

Nakaji, Koudo; Li, Hao; Kiba, Takayuki; Igarashi, Makoto; Samukawa, Seiji; Murayama, Akihiro

doi:10.1186/1556-276x-7-629

Cited by 16 publications

(10 citation statements)

References 10 publications

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“…Gold-based micro/nanostructures, such as micro/nanoparticles, 5 micro/nanosphere arrays, 6 micro/nanotubes, 7 and so forth, have been considered as advanced optical materials owing to their excellent plasmonic properties 8 and strong and characteristic photoemission 9 in the presence of an external excitation field, such as optical pumping. The macroscale foamed Au material with micro/nanoscale structural unit is a new class of micro/nano-Au structure, which has not yet been investigated widely and deeply.…”

Section: Introductionmentioning

confidence: 99%

Photon-Induced Light Emission from Foamed Gold with Micro/Nanohollow Sphere Structures

Ding

Liang

et al. 2017

ACS Omega

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We present a study on photon-induced light emission at room temperature from macroscale foamed gold with micro/nanoscale hollow spheres synthesized by seed-mediated growth method. Samples with a fixed sphere diameter but different Au densities are examined. It is demonstrated that strong and characteristic light emission from these samples can be achieved under optical excitation. In a short excitation wavelength regime (280–470 nm), the peak position in the photoemission spectrum increases almost linearly with excitation wavelength. In a relatively long-wavelength excitation regime (478–520 nm), photoluminescence (PL) can be observed where the peak position in the PL spectrum depends very little on excitation wavelength and two peaks can be seen in the PL emission spectrum. These effects do not change significantly with varying sample density, although it is found that the intensity of the light emission increases with sample density. We find that the features of the PL emission from foamed gold with micro/nanoscale hollow spheres differ significantly from those observed for Au nanoparticles. This study is relevant to the application of Au micro/nanostructures as advanced optoelectronic materials and devices.

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Section: Introductionmentioning

confidence: 99%

Photon-Induced Light Emission from Foamed Gold with Micro/Nanohollow Sphere Structures

Ding

Liang

et al. 2017

ACS Omega

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“…Because of the high‐index dielectric nanoparticles, these hybrid structures have an artificial resonant magnetic response in the visible range, whereas the plasmonic ones provide a strong electric field enhancement. Today, the hybrid nanostructures and nanoantennas have a plethora of applications, including an ultrahigh optical light absorption , a unidirectional visible light scattering , plasmon‐enhanced photocatalytic chemical reactions like photodegradation of organic pollutants , enhancing and tailoring the photoluminescence , the surface‐enhanced Raman scattering , and solar cells with high power conversion efficiencies .…”

Section: Introductionmentioning

confidence: 99%

Approach for fine‐tuning of hybrid dimer antennas via laser melting at the nanoscale

et al. 2016

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Asymmetric metal-dielectric nanostructures are demonstrated superior optical properties arising from the combination of strong enhancement of near-fields and controllable scattering characteristics which originate from plasmonic and high-index dielectric components. Here, being inspired by the recent advances of the asymmetric hybrid nanoparticles fabrication [Dmitry Zuev, et al., Adv. Mater. 28, 3087 (2016)], we suggest and study numerically a novel type of hybrid dimer nanoantennas. The nanoantennas consist of asymmetric metal-dielectric (Au/Si) nanoparticles and allow tuning of the near-and far-field properties via laser induced reshaping of the metal part at the nanoscale. We demonstrate an ability to modification of the scattering properties, near-field distribution profilis, normalized local density of states, and radiation patterns of the nanoantenna upon the laser reshaping. The parameters used to investigate these effects correspond to experimentally demonstrated values.

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“…The recongurable plasmonic substrates described here have potential applications in optoelectronic devices, including light-emitting applications, 4-10 solar cells, 14 and sensors. 15,16 To investigate the applicability of the recongurable plasmonic substrates to such optoelectronic applications, we carried out PL measurements.…”

Section: Resultsmentioning

confidence: 99%

“…Fig. 11,14,[26][27][28] PL enhancements were in the range of ve-folds when randomly distributed gold nanoparticles were applied, 11,14 about 100-300% applying silver nanoparticle distributions transformed thermally, 26,27 and 280% PL enhancement of SiC nanocrystal by proximal silver nanoparticles. The enhancement in the PL intensity was similar for all diameter Ag features.…”

Section: Resultsmentioning

confidence: 99%

Configurable plasmonic substrates from heat-driven imprint-transferred Ag nanopatterns for enhanced photoluminescence

et al. 2015

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Despite substantial progress in metal nanopatterning, fabricating ultra-large-area plasmonic substrates with well-defined and well-controlled nanopatterned arrays remains a major technological challenge. Here, we describe a novel facile technology (i.e., configurable metal nanoimprint transfer based on geometric reconfiguration during thermal annealing) to fabricate ultra-large-area tunable plasmonic substrates. The simultaneous transfer and imprint of the metal layers from the patterned mold surface results in metal nanopatterns embedded in a partially cured photoresist, the shape of which can be modified systematically by optimized heat treatments. The plasmonic properties of the metal nanopattern array could be precisely tuned through the heat-driven shape reconfiguration of metal patterns. The shape transformation leads to sharp and blue-shifted extinction spectra and unusual strong excitation of the transverse mode of metal nanopatterns. Coarse tuning of the plasmon resonance wavelength is achieved by varying the diameter of the nanopatterned features, and fine tuning is accomplished by reconfiguring the geometry of the nanopatterned features via thermal annealing. Only three master patterns are required to cover the wavelength range 535-837 nm. By applying the plasmon substrates to photoluminescence (PL) measurements, an enhancement in the green photoluminescence (PL) intensity of a factor more than 9.4 is achieved due to the improved matching between the wavelengths for PL emission and plasmon resonance. The fabrication strategy described here enables us to achieve various plasmonic properties using a single master pattern, which provides both tailorable plasmonic properties and remarkable process flexibility.

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Plasmonic enhancements of photoluminescence in hybrid Si nanostructures with Au fabricated by fully top-down lithography

Cited by 16 publications

References 10 publications

Photon-Induced Light Emission from Foamed Gold with Micro/Nanohollow Sphere Structures

Photon-Induced Light Emission from Foamed Gold with Micro/Nanohollow Sphere Structures

Approach for fine‐tuning of hybrid dimer antennas via laser melting at the nanoscale

Configurable plasmonic substrates from heat-driven imprint-transferred Ag nanopatterns for enhanced photoluminescence

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