Surface plasmon resonances and plasmon hybridization in compositional Al/Al2O3/SiO2 nanorings at the UV spectrum to the near infrared region (NIR)

2015 ◽  
Vol 66 ◽  
pp. 9-14 ◽  
Author(s):  
Arash Ahmadivand ◽  
Saeed Golmohammadi
Keyword(s):  
Surface Plasmon ◽  
Near Infrared ◽  
Infrared Region ◽  
Plasmon Hybridization ◽  
Surface Plasmon Resonances ◽  
Uv Spectrum ◽  
Plasmon Resonances ◽  
Near Infrared Region

Tunable localized surface plasmon resonances of asymmetric Au/SiO2/Au cross-shape nanobars

2014 ◽  
Vol 28 (17) ◽  
pp. 1450143 ◽  
Author(s):  
M. L. Wan ◽  
H. J. Du ◽  
Y. L. Song ◽  
F. Q. Zhou ◽  
K. J. Dai
Keyword(s):  
Electric Fields ◽  
Surface Plasmon ◽  
Near Infrared ◽  
Dipole Approximation ◽  
Localized Surface Plasmon ◽  
Surface Plasmon Resonances ◽  
Localized Surface Plasmon Resonances ◽  
Plasmon Resonances ◽  
Surface Enhanced Raman ◽  
Infrared Spectral

The plasmonic properties of asymmetric Au / SiO 2/ Au sandwiched cross-shape nanobars are investigated theoretically using the discrete dipole approximation (DDA) method. Two localized surface plasmon resonances are observed in the extinction spectra, which perform extreme sensitivity to the length and width of the nanobar and can be tuned easily throughout visible and into near-infrared spectral regions. The local electric fields around the nanobar are calculated and a pure electromagnetic Raman enhancement factor of about 106 can be achieved. In addition, compared to a monolayer gold nanobar, it exhibits more "hot spots" and stronger localized electric field enhancements. This plasmonic substrate provides potential applications in surface enhanced Raman scattering (SERS) and nonlinear optical devices.

Surface Plasmon Resonance with Electrospun Nanofibers on Gold Surface

2009 ◽  
Vol 1173 ◽  
Author(s):  
Kazuma Tsuboi ◽  
Hidetoshi Matsumoto ◽  
Mie Minagawa ◽  
Akihiko Tanioka
Keyword(s):  
Surface Plasmon ◽  
Near Infrared ◽  
Polarized Light ◽  
Electrospun Nanofibers ◽  
Gold Surface ◽  
Infrared Region ◽  
Peak Wavelength ◽  
Absorption Bands ◽  
Propagation Length ◽  
Near Infrared Region

AbstractIn this paper we report new excitation method of surface plasmon polariton (SPP) at air/gold interface with electrospun nanofibers. Nanofibers of polyvinylpirrolidone were electrospun onto the surface of a gold film. The observations by scanning electron microscopy and optical microscopy indicated that the average diameters of the nanofibers were about 300 nm and average sizes of pores were about 30-40 μm. Optical response of the nanofibers on gold surface was investigated by polarized reflection absorption spectroscopy (RAS). The RAS spectrum with p-polarized light showed two absorption bands while the spectrum with s-polarized light only one band. One is a band at about 520 nm that also found in the spectrum with s-polarized light. Another is a broad band in the near-infrared region which found only with p-polarized light. The peak intensity of the latter band increases with increase of incident angle of the polarized light and the peak wavelength of the band shifted to longer wavelength. These responses suggested that SPP at air/gold interface was excited with the scattering light from the electrospun nanofibers. We also found that the peak wavelength of the absorption band in near-infrared region changed with the increase of the amount of the nanofibers. This may be due to the fact that the sizes of the pores on gold surface became smaller than the propagation length of SPP, which resulted in scattering and interference of SPP.

scholarly journals Tunable and Anisotropic Dual-Band Metamaterial Absorber Using Elliptical Graphene-Black Phosphorus Pairs

2019 ◽  
Vol 14 (1) ◽  
Author(s):  
Yijun Cai ◽  
Shuangluan Li ◽  
Yuanguo Zhou ◽  
Xuanyu Wang ◽  
Kai-Da Xu ◽  
...  
Keyword(s):  
Electric Field ◽  
Surface Plasmon ◽  
Infrared Region ◽  
Metamaterial Absorber ◽  
Black Phosphorus ◽  
Dual Band ◽  
Polarization Sensitivity ◽  
Surface Plasmon Resonances ◽  
Field Distributions ◽  
Plasmon Resonances

AbstractWe numerically propose a dual-band absorber in the infrared region based on periodic elliptical graphene-black phosphorus (BP) pairs. The proposed absorber exhibits near-unity anisotropic absorption for both resonances due to the combination of graphene and BP. Each of the resonances is independently tunable via adjusting the geometric parameters. Besides, doping levels of graphene and BP can also tune resonant properties effectively. By analyzing the electric field distributions, surface plasmon resonances are observed in the graphene-BP ellipses, contributing to the strong and anisotropic plasmonic response. Moreover, the robustness for incident angles and polarization sensitivity are also illustrated.

scholarly journals Multiple Surface Plasmon Resonances and Near-Infrared Field Enhancement of Gold Nanowells

2008 ◽  
Vol 80 (13) ◽  
pp. 4945-4950 ◽  
Author(s):  
Kebin Li ◽  
Liviu Clime ◽  
Lilin Tay ◽  
Bo Cui ◽  
Matthias Geissler ◽  
...  
Keyword(s):  
Surface Plasmon ◽  
Near Infrared ◽  
Field Enhancement ◽  
Surface Plasmon Resonances ◽  
Plasmon Resonances ◽  
Multiple Surface Plasmon Resonances

scholarly journals Surface Plasmon Resonances in Sn: In2O3 Thin Films with Diffraction Grating

Proceedings ◽  
2018 ◽  
Vol 2 (13) ◽  
pp. 1034
Author(s):  
Noriyuki Hasuike ◽  
Saito Ochiai ◽  
Ryotaro Iwakiri ◽  
Minoru Takeda ◽  
Woo Sik Yoo ◽  
...  
Keyword(s):  
Surface Plasmon ◽  
Spectral Region ◽  
Diffraction Grating ◽  
Near Infrared ◽  
Transparent Conductive Oxide ◽  
Infrared Region ◽  
Reflection Spectra ◽  
Surface Plasmon Resonances ◽  
Infrared Spectral Region ◽  
Infrared Spectral

We newly proposed transparent conductive oxide with diffraction grating structure as an excitation field of surface plasmon resonance working at near-infrared spectral region. We experimentally demonstrated the excitation of SPR using Sn-doped In2O3 films with micro-meter pitched diffraction grating. In this study, we considered the correlation between the grating pitch and the optical reflection spectra. Reflection spectra showed clear polarization properties in infrared spectral region, and the reflection edge has also correlation with the pitch of grating. From these results, the excitation of SPR grating was successfully demonstrated and the wavelength can be tuned by changing the grating pitch in infrared region.

Tunable near-infrared localized surface plasmon resonances of djurleite nanocrystals: effects of size, shape, surface-ligands and oxygen exposure time

2015 ◽  
Vol 3 (26) ◽  
pp. 6686-6691 ◽  
Author(s):  
Dongxu Zhu ◽  
Aiwei Tang ◽  
Haihang Ye ◽  
Miao Wang ◽  
Chunhe Yang ◽  
...  
Keyword(s):  
Surface Plasmon ◽  
Exposure Time ◽  
Near Infrared ◽  
Resonance Absorption ◽  
Localized Surface Plasmon ◽  
Surface Plasmon Resonances ◽  
Surface Ligands ◽  
Localized Surface Plasmon Resonances ◽  
Oxygen Exposure ◽  
Plasmon Resonances

The effects of size, shape, surface ligands and oxygen exposure time on the localized surface plasmon resonance absorption in monoclinic djurleite nanocrystals have been demonstrated.

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