Journal ArticleDOI
Electric field enhancement and light transmission in cylindrical nanoholes.
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TLDR
In this article, the authors examined the properties of subwavelength cylindrical apertures and found that the largest enhancements are localized at the edge of the aperture, close to its rim.Abstract:
The properties of electric fields in subwavelength cylindrical apertures are examined upon excitation by a far-field source. We find that the largest enhancements are localized at the edge of the aperture, close to its rim. Both the entrance and exit rims of the hole can produce intense fields, although at long wavelengths thick slabs lead to smaller fields at the exit rim. The fields display a two lobe angular pattern characteristic of a radiating dipole in the near field. The influence of aperture size and slab thickness on field enhancement is presented. Although there is often a connection between peak transmission and peak field, the two rarely occur at the same wavelength. Enhancements in the electric field intensity can be increased by an order of magnitude by adding a grooved structure around the aperture, which acts as a grating and permits coupling to surface plasmon polaritons. Our results indicate that nanohole systems can be optimized to yield large electric field enhancements, making them an attractive medium for surface enhanced spectroscopies.read more
Citations
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Journal ArticleDOI
Inverted Size-Dependence of Surface-Enhanced Raman Scattering on Gold Nanohole and Nanodisk Arrays
TL;DR: The large tolerance on dimensions and the empty space confined by nanoholes suggest promise for their use as a functional component in sensing, spectroscopy, and photonic devices.
Journal ArticleDOI
Modelling of nanoparticles: approaches to morphology and evolution
TL;DR: In this paper, various computational approaches are described as they apply to the study of the structure and formation of discrete inorganic nanoparticles, and case studies are constructed on carbon, titania and gold nanoparticles.
Journal ArticleDOI
Excitation enhancement of CdSe quantum dots by single metal nanoparticles
Yeechi Chen,Keiko Munechika,Ilan Jen-La Plante,Andrea M. Munro,Sara E. Skrabalak,Younan Xia,David S. Ginger +6 more
TL;DR: In this paper, plasmon-enhanced fluorescence from CdSe∕CdS∕ CdZnS ∕ ZnS core/shell quantum dots near a variety of Ag and Au nanoparticles was studied.
Journal ArticleDOI
Modeling Fluorescence Enhancement from Metallic Nanocavities
TL;DR: In this article, the excitation and emission enhancement mechanisms for fluorescence from molecules confined within subwavelength metal apertures, or nanocavities, were studied and the variation in these enhancements with wavelength was calculated for individual round nanometers in gold of varying diameters and dielectric environments.
Journal ArticleDOI
Fluorescence enhancement of quantum emitters with different energy systems near a single spherical metal nanoparticle
Yingjie Zhang,Ruo-Yang Zhang,Qingru Wang,Zhishuai Zhang,Haibo Zhu,Jiadong Liu,Feng Song,Shangxin Lin,E.Y.B. Pun +8 more
TL;DR: The numerical results provide the first theoretical prediction showing that the MNP may selectively enhance a certain fluorescence process among various ones.
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