scholarly journals Single-plasmon interferences

2016 ◽  
Vol 2 (3) ◽  
pp. e1501574 ◽  
Author(s):  
Marie-Christine Dheur ◽  
Eloïse Devaux ◽  
Thomas W. Ebbesen ◽  
Alexandre Baron ◽  
Jean-Claude Rodier ◽  
...  
Keyword(s):  
Surface Plasmons ◽  
Surface Plasmon ◽  
Electromagnetic Waves ◽  
The Other ◽  
Air Interface ◽  
Wave Nature ◽  
Direct Demonstration ◽  
Wave Particle Duality ◽  
Dielectric Interfaces ◽  
Plasmon Polaritons

Surface plasmon polaritons are electromagnetic waves coupled to collective electron oscillations propagating along metal-dielectric interfaces, exhibiting a bosonic character. Recent experiments involving surface plasmons guided by wires or stripes allowed the reproduction of quantum optics effects, such as antibunching with a single surface plasmon state, coalescence with a two-plasmon state, conservation of squeezing, or entanglement through plasmonic channels. We report the first direct demonstration of the wave-particle duality for a single surface plasmon freely propagating along a planar metal-air interface. We develop a platform that enables two complementary experiments, one revealing the particle behavior of the single-plasmon state through antibunching, and the other one where the interferences prove its wave nature. This result opens up new ways to exploit quantum conversion effects between different bosonic species as shown here with photons and polaritons.

scholarly journals Plasmon-Enhanced Photoluminescence of an Amorphous Silicon Quantum Dot Light-Emitting Device by Localized Surface Plasmon Polaritons in Ag/SiOx:a-Si QDs/Ag Sandwich Nanostructures

2015 ◽  
Vol 2015 ◽  
pp. 1-6 ◽  
Author(s):  
Tsung-Han Tsai ◽  
Ming-Yi Lin ◽  
Wing-Kit Choi ◽  
Hoang Yan Lin
Keyword(s):  
Amorphous Silicon ◽  
Surface Plasmons ◽  
Surface Plasmon ◽  
Surface Plasmon Polaritons ◽  
Localized Surface Plasmon ◽  
Light Emitting ◽  
Grating Structure ◽  
Enhanced Photoluminescence ◽  
Silicon Quantum Dot ◽  
Plasmon Polaritons

We investigated experimentally the plasmon-enhanced photoluminescence of the amorphous silicon quantum dots (a-Si QDs) light-emitting devices (LEDs) with theAg/SiOx:a-Si QDs/Ag sandwich nanostructures, through the coupling between the a-Si QDs and localized surface plasmons polaritons (LSPPs) mode, by tuning a one-dimensional (1D) Ag grating on the top. The coupling of surface plasmons at the top and bottomAg/SiOx:a-Si QDs interfaces resulted in the localized surface plasmon polaritons (LSPPs) confined underneath the Ag lines, which exhibit the Fabry-Pérot resonance. From the Raman spectrum, it proves the existence of a-Si QDs embedded in Si-richSiOxfilm (SiOx:a-Si QDs) at a low annealing temperature (300°C) to prevent the possible diffusion of Ag atoms from Ag film. The photoluminescence (PL) spectra of a-Si QDs can be precisely tuned by a 1D Ag grating with different pitches and Ag line widths were investigated. An optimized Ag grating structure, with 500 nm pitch and 125 nm Ag line width, was found to achieve up to 4.8-fold PL enhancement at 526 nm and 2.46-fold PL integrated intensity compared to the a-Si QDs LEDs without Ag grating structure, due to the strong a-Si QDs-LSPPs coupling.

A near-transparent 90∘ polarization rotator with an array of L-shaped holes inside a glass cube

2016 ◽  
Vol 30 (20) ◽  
pp. 1650259 ◽  
Author(s):  
Yan-Lin Liao ◽  
Yan Zhao ◽  
He-Ping Lu
Keyword(s):  
Surface Plasmons ◽  
Surface Plasmon ◽  
Single Layer ◽  
Destructive Interference ◽  
Localized Surface Plasmons ◽  
Cross Polarization ◽  
Polarization Rotation ◽  
Polarization Rotator ◽  
Plasmon Polaritons ◽  
Polarization Rotators

We report a near-transparent 90[Formula: see text] polarization rotator by using a single-layer microstructure. The co-polarization light has been suppressed by using destructive interference. At the same time, the transmission of cross-polarization light has been improved with inference effect between surface plasmon polaritons (SPPs) and localized surface plasmons (LSPs). This efficient polarization rotation mechanism may be very useful in designing polarization rotators.

scholarly journals Flexible Microwave Biosensor for Skin Abnormality Detection Based on Spoof Surface Plasmon Polaritons

Micromachines ◽  
2021 ◽  
Vol 12 (12) ◽  
pp. 1550
Author(s):  
Junkai Bai ◽  
Hongfu Guo ◽  
Hua Li ◽  
Chen Zhou ◽  
Hanchao Tang
Keyword(s):  
Surface Plasmon ◽  
Surface Plasmon Polaritons ◽  
Electromagnetic Waves ◽  
Point Of Care ◽  
Skin Surface ◽  
Skin Tumor ◽  
Point Of Care Testing ◽  
Skin Abnormalities ◽  
Plasmon Polaritons ◽  
Spoof Surface Plasmon Polaritons

Point-of-care testing plays an important role in the detection of skin abnormalities. The detection of skin abnormalities requires sufficient depth and no harm. A flexible microwave biosensor based on spoof surface plasmon polaritons was designed to meet the requirements of skin abnormalities. The designed biosensor, which works at 13.3 GHz, is small and can be flexibly attached to the skin surface of any part of the human body for measurement. The health status of the skin can be evaluated by the resonant frequency and the magnitude of the reflection coefficient of the sensor. The sensor was tested on pork skin. The experiment results showed that the sensor can detect skin abnormalities such as skin burn, skin tumor, and others. Compared with other sensors, the sensor has sufficient penetration depth because of the strong penetration of microwave electromagnetic waves. It is the first flexible microwave biosensor used for skin, which involves point-of-care testing, and continuous monitoring of skin.

Surface Plasmon Polaritons Excited by Narrow Beam in Kretschmann Structure

2011 ◽  
Vol 110-116 ◽  
pp. 1015-1019
Author(s):  
Shu Yang ◽  
Zhi Ning Yin
Keyword(s):  
Surface Plasmon ◽  
Surface Plasmon Polaritons ◽  
Fdtd Method ◽  
Narrow Beam ◽  
Metal Interface ◽  
Surface Plasmon Wave ◽  
Air Interface ◽  
Plasmon Polaritons ◽  
Plasmon Wave

FDTD method is used to simulate SPPs in the Kretschmann structure. It is observed that the surface plasmon wave propagates not only with the attenuation but also with the oscillation. This paper explains the reasons for this phenomenon: the oscillation is caused by coupling of SPPs in the metal - air interface and dielectric - metal interface.

scholarly journals Copper–gold sandwich structures on PE and PET and their SERS enhancement effect

RSC Advances ◽  
2017 ◽  
Vol 7 (37) ◽  
pp. 23055-23064 ◽  
Author(s):  
Alena Reznickova ◽  
Petr Slepicka ◽  
Hoang Yen Nguyenova ◽  
Zdenka Kolska ◽  
Marcela Dendisova ◽  
...  
Keyword(s):  
Surface Plasmons ◽  
Surface Plasmon ◽  
Copper Nanoparticles ◽  
Surface Plasmon Polaritons ◽  
Sandwich Structures ◽  
Enhancement Effect ◽  
Localized Surface Plasmons ◽  
Sers Enhancement ◽  
Copper Gold ◽  
Plasmon Polaritons

In this paper we have investigated the SERS effect of gold–copper sandwich structures i.e. the coupling between surface plasmon polaritons supported by the gold grating and localized surface plasmons excited on the grafted copper nanoparticles.

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