Surface-plasmon excitation on oxide-covered spherical particles

Small particles exhibit chemical and physical behaviors substantially different from bulk materials. This is due to the fact that boundary conditions can induce specific constraints on the observed properties. As an example, energy loss experiments carried out in an analytical electron microscope, constitute a powerful technique to investigate the excitation of collective surface modes (plasmons), which are modified in a limited size medium. In this work a STEM VG HB501 has been used to study the low energy loss spectrum (1-40 eV) of silicon spherical particles [1], and the spatial localization of the different modes has been analyzed through digitally acquired energy filtered images. This material and its oxides have been extensively studied and are very well characterized, because of their applications in microelectronics. These particles are thus ideal objects to test the validity of theories developed up to now.Typical EELS spectra in the low loss region are shown in fig. 2 and energy filtered images for the main spectral features in fig. 3.

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Enhanced Photocurrent Properties of Dye/Au-Loaded TiO2 Films by Grating-Coupled Surface Plasmon Excitation

IEICE Transactions on Electronics ◽

10.1587/transele.e96.c.385 ◽

2013 ◽

Vol E96.C (3) ◽

pp. 385-388 ◽

Cited By ~ 1

Author(s):

Hathaithip NINSONTI ◽

Weerasak CHOMKITICHAI ◽

Akira BABA ◽

Wiyong KANGWANSUPAMONKON ◽

Sukon PHANICHPHANT ◽

...

Keyword(s):

Surface Plasmon ◽

Tio2 Films ◽

Plasmon Excitation ◽

Surface Plasmon Excitation

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Enhancing the Output Performance of Triboelectric Nanogenerator via Grating‐Electrode‐Enabled Surface Plasmon Excitation

Advanced Energy Materials ◽

10.1002/aenm.201902725 ◽

2019 ◽

Vol 9 (44) ◽

pp. 1902725 ◽

Cited By ~ 9

Author(s):

Lingxiao Gao ◽

Xin Chen ◽

Shan Lu ◽

Hong Zhou ◽

Weibo Xie ◽

...

Keyword(s):

Surface Plasmon ◽

Triboelectric Nanogenerator ◽

Plasmon Excitation ◽

Output Performance ◽

Surface Plasmon Excitation

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Directional Plasmonic Excitation by Helical Nanotips

Nanomaterials ◽

10.3390/nano11051333 ◽

2021 ◽

Vol 11 (5) ◽

pp. 1333

Author(s):

Leeju Singh ◽

Nicolò Maccaferri ◽

Denis Garoli ◽

Yuri Gorodetski

Keyword(s):

Surface Plasmon ◽

Single Scattering ◽

Coupling Factor ◽

Metallic Surface ◽

Phase Matching ◽

Plasmon Excitation ◽

Surface Plasmon Excitation ◽

Specific Momentum ◽

Plasmon Polaritons ◽

Strong Spin

The phenomenon of coupling between light and surface plasmon polaritons requires specific momentum matching conditions. In the case of a single scattering object on a metallic surface, such as a nanoparticle or a nanohole, the coupling between a broadband effect, i.e., scattering, and a discrete one, such as surface plasmon excitation, leads to Fano-like resonance lineshapes. The necessary phase matching requirements can be used to engineer the light–plasmon coupling and to achieve a directional plasmonic excitation. Here, we investigate this effect by using a chiral nanotip to excite surface plasmons with a strong spin-dependent azimuthal variation. This effect can be described by a Fano-like interference with a complex coupling factor that can be modified thanks to a symmetry breaking of the nanostructure.

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