Localized surface plasmon-enhanced photoluminescence of amorphous silicon quantum dots through plasmonic subwavelength crossed metallic gratings

2016 ◽  
Vol 55 (4S) ◽  
pp. 04EH15 ◽  
Author(s):  
Tsung-Han Tsai ◽  
Ming-Yi Lin ◽  
Li-Jen Hsiao ◽  
Wing-Kit Choi ◽  
Hoang Yan Lin
Keyword(s):  
Quantum Dots ◽  
Amorphous Silicon ◽  
Surface Plasmon ◽  
Localized Surface Plasmon ◽  
Silicon Quantum Dots ◽  
Enhanced Photoluminescence ◽  
Metallic Gratings

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.

Amorphous silicon–carbon alloys for efficient localized surface plasmon resonance sensing

2010 ◽  
Vol 25 (5) ◽  
pp. 1199-1203 ◽  
Author(s):  
Elisabeth Galopin ◽  
Larbi Touahir ◽  
Joanna Niedziółka-Jönsson ◽  
Rabah Boukherroub ◽  
Anne Chantal Gouget-Laemmel ◽  
...  
Keyword(s):  
Surface Plasmon Resonance ◽  
Amorphous Silicon ◽  
Surface Plasmon ◽  
Plasmon Resonance ◽  
Localized Surface Plasmon Resonance ◽  
Localized Surface Plasmon ◽  
Silicon Carbon

scholarly journals Tuning of Localized Surface Plasmon Resonance in Copper-Copper Oxide Core-Shell Quantum Dots for the Application in Biosensors

2020 ◽  
Author(s):  
Prabhash Prasannan Geetha ◽  
Ajith Ramachandran ◽  
Swapna S. Nair
Keyword(s):  
Quantum Dots ◽  
Surface Plasmon Resonance ◽  
Copper Oxide ◽  
Surface Plasmon ◽  
Plasmon Resonance ◽  
Particle Diameter ◽  
Noble Metal Nanoparticles ◽  
Localized Surface Plasmon ◽  
Core Shell ◽  
Chemical Route

Surface Plasmon Resonance (SPR) is an attracting property of certain transition metals when they are synthesized in nano-range giving rise to promising optical applications. However, most SPR and associated applications are limited to the noble metal nanoparticles, which limits their potential due to high production cost. We report surface plasmon resonance in copper-copper oxide core-shell quantum dots synthesized via chemical route studied by using UV-Visible spectrophotometry. Tuning of the plasmonic resonance with respect to the particle diameter is achieved by an inexpensive all chemical route. Photoluminescence measurements also support the data. This size reduction leads to remarkable changes in its optical response as compared to the bulk metal. The results point towards applications of these materials in tunable SPR based biosensors.

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