Highly enhanced spontaneous emission with nanoshell-based metallodielectric hybrid antennas

Cheng, Yuqing; Lü, Guowei; Shen, Hongming; Wang, Yuwei; He, Yu; Chou, R. Yuanying; Gong, Qihuang

doi:10.1016/j.optcom.2015.03.073

Cited by 8 publications

(3 citation statements)

References 26 publications

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“…To investigate the surface-enhanced fluorescence performances of the nano-aperture antennas, finite-difference time-domain (FDTD) was used to calculate the electromagnetic features of the nanostructures, including electromagnetic field distribution, Purcell factor, and antenna quantum efficiency [ 23 , 24 , 25 ]. The FDTD is a mature method that has been extensively employed to study both the near- and far-field electromagnetic responses of the nanostructures with different arbitrary shapes [ 26 , 27 ].…”

Section: Methodsmentioning

confidence: 99%

Hybrid Metal-Dielectric Nano-Aperture Antenna for Surface Enhanced Fluorescence

Lü

Wen

et al. 2018

Materials

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A hybrid metal-dielectric nano-aperture antenna is proposed for surface-enhanced fluorescence applications. The nano-apertures that formed in the composite thin film consist of silicon and gold layers. These were numerically investigated in detail. The hybrid nano-aperture shows a more uniform field distribution within the apertures and a higher antenna quantum yield than pure gold nano-apertures. The spectral features of the hybrid nano-apertures are independent of the aperture size. This shows a high enhancement effect in the near-infrared region. The nano-apertures with a dielectric gap were then demonstrated theoretically for larger enhancement effects. The hybrid nano-aperture is fully adaptable to large-scale availability and reproducible fabrication. The hybrid antenna will improve the effectiveness of surface-enhanced fluorescence for applications, including sensitive biosensing and fluorescence analysis.

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Section: Methodsmentioning

confidence: 99%

Hybrid Metal-Dielectric Nano-Aperture Antenna for Surface Enhanced Fluorescence

Lü

Wen

et al. 2018

Materials

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“…Hybrid core/shell nanoparticles with a dielectric core and a metallic shell have also aroused a particular interest; this interest is due to the fact that such the heterostructure provides additional degrees of freedom such as the material type and the relative core and shell sizes to tailor their optical response for specific applications. In particular, gold nanoshells have attracted significant attention for its application in biotechnology and biomedicine [2][3][4][5][6][7][8][9][10][11] because of its good biocompatibility and high chemical stability in addition to its tunable optical properties. e occurrence of morphology-dependent LSPRs in metallic nanostructures has stimulated numerous simulation studies [12][13][14][15][16][17][18][19][20][21][22][23][24][25][26][27].…”

Section: Introductionmentioning

confidence: 99%

Theoretical Analysis of the Optical Response of Silicon/Silica/Gold Multishell Nanoparticles in Biological Tissue

Chaâbani

Chehaidar

Proust

et al. 2019

Advances in Materials Science and Engineering

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e scattering and absorption efficiencies of light by a single silicon/silica/gold spherical multishell in biological tissues are analyzed theoretically in the framework of Lorenz-Mie theory and finite-difference time-domain formalism. We first revised the ideal case of a concentric silicon/gold nanoshell, analyzed the effect of growing a silica layer of uniform thickness around the silicon core, and then examined the effect of an offset of the gold shell with respect to the centre of the silicon/silica nanoshell. Our simulation showed that the silicon/gold nanoshell in the biological tissue supports significant absorption and scattering resonances in the biological spectral window. On the contrary, the growth of a silica layer on the silicon core surface leads to a blueshift of these resonances accompanied by a slight increase of their magnitudes. e offset of the gold shell with respect to the silicon/ silica core results in a redshift of the absorption and scattering resonances supported by the concentric silicon/silica/gold multishell within the biological window, accompanied by a decrease in their amplitudes. On the contrary, the gold shell offset gives rise to a more prominent electric field enhancement at the silicon/silica/gold multishell-biological tissue interface. Our simulation thus shows that silicon/silica/gold multishell nanoparticles are potential candidates in bioimaging and photothermal therapy applications.

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“…[24] A deeper understanding of this process would be helpful for understanding and optimizing plasmon enhanced spectroscopy. [25] However, there remains some controversy concerning the physical mechanism of this effect. Here, we tentatively call this luminescence process photoluminescence (PL).…”

Section: Introductionmentioning

confidence: 99%

Intrinsic luminescence from metal nanostructures and its applications

Zhang¹,

Wen²,

Cheng³

et al. 2018

Chinese Phys. B

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Intrinsic luminescence from metal nanostructures complements conventional scattering and absorption behaviors and has many interesting and unique features. This phenomenon has attracted considerable research attention in recent years because of its various potential applications. In this review, we discuss recent advances in this field, summarize potential applications for this type of luminescence, and compare theoretical models to describe the phenomena. On the basis of the excitation process, the characteristic features and corresponding applications are summarized briefly in three parts, namely, continuous-wave light, pulsed laser, and electron excitation. A universal physical mechanism likely operates in all these emission processes regardless of differences in the excitation processes; however, there remains some debate surrounding the details of the theoretical model. Further insight into these luminescence phenomena will not only provide a deeper fundamental understanding of plasmonic nanostructures but will also advance and extend their applications.

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Highly enhanced spontaneous emission with nanoshell-based metallodielectric hybrid antennas

Cited by 8 publications

References 26 publications

Hybrid Metal-Dielectric Nano-Aperture Antenna for Surface Enhanced Fluorescence

Hybrid Metal-Dielectric Nano-Aperture Antenna for Surface Enhanced Fluorescence

Theoretical Analysis of the Optical Response of Silicon/Silica/Gold Multishell Nanoparticles in Biological Tissue

Intrinsic luminescence from metal nanostructures and its applications

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