scholarly journals Cathodoluminescence as a probe of the optical properties of resonant apertures in a metallic film

2018 ◽  
Vol 9 ◽  
pp. 1491-1500 ◽  
Author(s):  
Kalpana Singh ◽  
Evgeniy Panchenko ◽  
Babak Nasr ◽  
Amelia Liu ◽  
Lukas Wesemann ◽  
...  
Keyword(s):  
Optical Properties ◽  
Surface Plasmon ◽  
Spatial Dependence ◽  
Gold Film ◽  
Electromagnetic Simulations ◽  
Resonant Modes ◽  
Fabry Perot ◽  
Plasmon Polaritons ◽  
Insight Into ◽  
Considerable Insight

Here we present the results of an investigation of resonances of azimuthal trimer arrangements of rectangular slots in a gold film on a glass substrate using cathodoluminescence (CL) as a probe. The variation in the CL signal collected from specific locations on the sample as a function of wavelength and the spatial dependence of emission into different wavelength bands provides considerable insight into the resonant modes, particularly sub-radiant modes, of these apertures. By comparing our experimental results with electromagnetic simulations we are able to identify a Fabry–Pérot mode of these cavities as well as resonances associated with the excitation of surface plasmon polaritons on the air–gold boundary. We obtain evidence for the excitation of dark (also known as sub-radiant) modes of apertures and aperture ensembles.

scholarly journals STRUCTURE AND OPTICAL PROPERTIES OF HYBRID METAL-DIELECTRIC COLLOIDAL PHOTONIC CRYSTALS

2017 ◽  
Vol 3 ◽  
pp. 37 ◽  
Author(s):  
A. V. Cvetkov ◽  
V. I. Gerbreders ◽  
S. D. Khanin ◽  
A. E. Lukin ◽  
A. S. Ogurcovs ◽  
...  
Keyword(s):  
Optical Properties ◽  
Photonic Crystals ◽  
Magnetron Sputtering ◽  
Surface Plasmon ◽  
Optical Materials ◽  
Colloidal Crystals ◽  
Bragg Diffraction ◽  
Colloidal Photonic Crystals ◽  
Fabry Perot ◽  
Plasmon Polaritons

Metal-dielectric nanocomposite optical materials based on colloidal crystals have been prepared by electro-thermo-diffusion or magnetron sputtering of silver. Optical properties of these photonic crystals have been studied by angle-resolved reflectance and transmission spectroscopy. The interpretation of observed spectra has been made taking into account the Bragg diffraction, Fano resonance, Fabry-Perot resonance and surface plasmon-polaritons, which excitations contribute to the optical properties of plasmonic-photonic crystals.

scholarly journals Broadband Absorption in Patterned Metal/Weakly-Absorbing-Spacer/Metal with Graded Photonic Super-Crystal

Photonics ◽  
2021 ◽  
Vol 8 (4) ◽  
pp. 114
Author(s):  
Steve Kamau ◽  
Safaa Hassan ◽  
Khadijah Alnasser ◽  
Hualiang Zhang ◽  
Jingbiao Cui ◽  
...  
Keyword(s):  
Surface Plasmon ◽  
Surface Plasmon Polariton ◽  
Near Infrared ◽  
Broadband Absorption ◽  
Au Film ◽  
Fabry Perot ◽  
Absorbing Material ◽  
Multiple Band ◽  
Band Absorption ◽  
Plasmon Polaritons

It is challenging to realize the complete broadband absorption of near-infrared in thin optical devices. In this paper, we studied high light absorption in two devices: a stack of Au-pattern/insulator/Au-film and a stack of Au-pattern/weakly-absorbing-material/Au-film where the Au-pattern was structured in graded photonic super-crystal. We observed multiple-band absorption, including one near 1500 nm, in a stack of Au-pattern/spacer/Au-film. The multiple-band absorption is due to the gap surface plasmon polariton when the spacer thickness is less than 30 nm. Broadband absorption appears in the near-infrared when the insulator spacer is replaced by a weakly absorbing material. E-field intensity was simulated and confirmed the formation of gap surface plasmon polaritons and their coupling with Fabry–Pérot resonance.

Scattering of surface plasmon-polaritons and volume waves by a rough gold film

2016 ◽  
Vol 41 (16) ◽  
pp. 3710 ◽  
Author(s):  
V. A. Sterligov ◽  
I. A. Grytsaienko ◽  
Y. Men
Keyword(s):  
Surface Plasmon ◽  
Surface Plasmon Polaritons ◽  
Gold Film ◽  
Plasmon Polaritons

LOCALIZED SURFACE PLASMON OF THIN GOLD FILM WITH PERIODIC ARRAYS OF NANOHOLES

2009 ◽  
Vol 23 (02) ◽  
pp. 147-153 ◽  
Author(s):  
ZONG-SUO ZHANG ◽  
XIONG-RUI SU ◽  
JIAN-BO LI ◽  
ZHONG-HUA HAO ◽  
LI ZHOU
Keyword(s):  
Surface Plasmon ◽  
Gold Film ◽  
Dipole Approximation ◽  
Resonance Peak ◽  
Localized Surface Plasmon ◽  
Gold Films ◽  
Thin Gold Film ◽  
Periodic Arrays ◽  
Edge Separation ◽  
Plasmon Polaritons

The localized surface plasmon (LSP) resonances properties of periodic arrays of nanoholes in thin gold films are investigated by using the method of discrete dipole approximation (DDA). The surface plasmon polaritons (SPPs) play important roles in amplification or suppression of the LSP resonances in the film. The LSP-SPP coupling is affirmed based on the extinction spectra calculated by the DDA. The intensity of the LSP resonances can be controlled through changing the edge-to-edge separation distances between nanoholes, the number and the diameter of the nanoholes. The calculations also indicate that the LSP resonance peak decreases with increasing the thickness of the gold film.

scholarly journals Visualizing the bidirectional electron transfer in a Schottky junction consisting of single CdS nanoparticles and a planar gold film

2017 ◽  
Vol 8 (7) ◽  
pp. 5019-5023 ◽  
Author(s):  
Zhimin Li ◽  
Yimin Fang ◽  
Yongjie Wang ◽  
Yingyan Jiang ◽  
Tao Liu ◽  
...  
Keyword(s):  
Electron Transfer ◽  
Surface Plasmon ◽  
Surface Plasmon Polaritons ◽  
Gold Film ◽  
Cds Nanoparticles ◽  
Schottky Junction ◽  
Hot Electron ◽  
Plasmon Polaritons

The surface plasmon polaritons induced the injection of a hot electron into the CdS nanoparticles at a Schottky junction.

scholarly journals Optical Scattering of Liquid Gallium Nanoparticles Coupled to Thin Metal Films

Nanomaterials ◽  
2020 ◽  
Vol 10 (6) ◽  
pp. 1052
Author(s):  
Fu Deng ◽  
Hongfeng Liu ◽  
Yuanyuan Peng ◽  
Mingcheng Panmai ◽  
Sheng Lan
Keyword(s):  
Surface Plasmon ◽  
White Light ◽  
Silver Film ◽  
Gold Film ◽  
Incidence Angle ◽  
Metal Films ◽  
Liquid Gallium ◽  
Scattering Spectrum ◽  
Gallium Nanoparticles ◽  
Plasmon Polaritons

We investigate experimentally and numerically the scattering properties of liquid gallium nanoparticles coupled to a thin gold or silver film. The gallium nanoparticles are excited either directly by using inclined white light or indirectly by surface plasmon polaritons generated on the surface of the gold/silver film. In the former case, the scattering spectrum is always dominated by a scattering peak at ∼540 nm with a long-wavelength shoulder which is redshifted with increasing diameter of the gallium nanoparticle. Under the excitation of the surface plasmon polaritons, optical resonances with much narrower linewidths, which are dependent on the incidence angle of the white light, appear in the scattering spectra. In this case, the scattering spectrum depends weakly on the diameter of the gallium nanoparticle but the radiation pattern exhibits a strong dependence. In addition, a significant enhancement of electric field is expected in the gap region between the gallium nanoparticles and the gold film based on numerical simulation. As compared with the gallium nanoparticle coupled to the gold film which exhibit mainly yellow and orange colors, vivid scattering light spanning the visible light spectrum can be achieved in the gallium nanoparticles coupled to the silver film by simply varying the incidence angle. Gallium nanoparticles coupled to thin metal films may find potential applications in light–matter interaction and color display.

Efficient Guiding of Terahertz Wave by Thin Metal Corrugation on Both Surfaces

2011 ◽  
Vol 687 ◽  
pp. 65-69 ◽  
Author(s):  
Dong Bin Tian ◽  
Huai Wu Zhang ◽  
Qi Ye Wen ◽  
Wei Wei Ling ◽  
Yuan Qiang Song ◽  
...  
Keyword(s):  
Surface Plasmon ◽  
Surface Plasmon Polaritons ◽  
Time Domain ◽  
Terahertz Wave ◽  
Transmission Characteristic ◽  
Low Loss ◽  
Reflected Waves ◽  
Resonance Modes ◽  
Fabry Perot ◽  
Plasmon Polaritons

Thin structured periodic metallic corrugations on both sides of low-loss thin polythene slab are proposed to efficiently guide terahertz (THz) wave based on the surface plasmon polaritons (SPPs). THz time domain spectrometer was used to measure the transmission characteristic. Long-lasting Fabry-Perot resonance modes are demonstrated due to the interferences of the multiple reflected waves.

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