Nanofabrication and Characterization of Subwavelength Metamaterials for Negative-index Propagation at Near-infrared Wavelengths

2007 ◽  
Author(s):  
Marcelo Davanco ◽  
Xuhuai Zhang ◽  
Stephen R. Forrest ◽  
Yaroslav Urzhumov ◽  
Gennady Shvets
Keyword(s):  
Near Infrared ◽  
Negative Index ◽  
Infrared Wavelengths

Double-element metamaterial with negative index at near-infrared wavelengths

2009 ◽  
Vol 34 (11) ◽  
pp. 1678 ◽  
Author(s):  
Ekaterina Pshenay-Severin ◽  
Uwe Hübner ◽  
Christoph Menzel ◽  
Christian Helgert ◽  
Arkadi Chipouline ◽  
...  
Keyword(s):  
Near Infrared ◽  
Negative Index ◽  
Infrared Wavelengths

scholarly journals Characterization of Sierpinski carpet optical antenna at visible and near-infrared wavelengths

2014 ◽  
Vol 16 (9) ◽  
pp. 093024 ◽  
Author(s):  
Ting Lee Chen ◽  
Dirk Jan Dikken ◽  
Jord C Prangsma ◽  
Frans Segerink ◽  
Jennifer L Herek
Keyword(s):  
Near Infrared ◽  
Optical Antenna ◽  
Sierpinski Carpet ◽  
Infrared Wavelengths ◽  
Sierpiński Carpet

scholarly journals Experimental characterization of dielectric-loaded plasmonic waveguide-racetrack resonators at near-infrared wavelengths

2012 ◽  
Vol 107 (2) ◽  
pp. 401-407 ◽  
Author(s):  
C. Garcia ◽  
V. Coello ◽  
Z. Han ◽  
I. P. Radko ◽  
S. I. Bozhevolnyi
Keyword(s):  
Near Infrared ◽  
Plasmonic Waveguide ◽  
Experimental Characterization ◽  
Infrared Wavelengths

Classification multi-spectrale et apport de la bande TM7, dans la distinction des dépôts meubles de l'île d'Anticosti, Québec

1985 ◽  
Vol 22 (8) ◽  
pp. 1139-1148 ◽  
Author(s):  
Sylvain Perras ◽  
Ferdinand Bonn ◽  
Hugh Gwyn ◽  
Jean-Marie Dubois
Keyword(s):  
Vegetation Index ◽  
Forest Cover ◽  
Near Infrared ◽  
Spectral Simulation ◽  
Alluvial Deposits ◽  
Strong Reflection ◽  
Infrared Wavelengths ◽  
Anticosti Island ◽  
Surficial Deposits

The differentiation between various surficial deposits and bedrock on Anticosti Island is difficult because of the dense and homogeneous forest cover and because of the subdued topography. Remote sensing allows us to solve this problem by making use of the physical characteristics of Quaternary deposits and the weathered bedrock, which influence internal drainage and the availability of soil moisture to the vegetation. A spectral simulation of LANDSAT-4 was made using an airborne Daedalus 1260, 11-channel scanner. Several supervised classifications of the digital images were made using test sites studied in the field. Using the raw data from Thematic Mapper bands TM2, TM3, TM4, and TM7, the geologic environments and the ecodynamic units could be distinguished with 70% accuracy. However, the integration of bands TM2 and TM4 with the vegetation index (VI) = [(TM4 – TM3)/(TM4 + TM3)] and the algorithme (A) = [(TM7 − VI)/(TM7 + VI)] resulted in a classification accuracy of 80%. Band TM7 (2,08–2,35 μm) distinguishes itself from the other bands by having a strong reflection over bare bedrock and an absorption by water, which allow the characterization of modern alluvial deposits. The characteristics of TM7 can also be distinguished from those of the near-infrared wavelengths of TM4, which are absorbed by forest vegetation.

scholarly journals Interferometric characterization of a sub-wavelength near-infrared negative index metamaterial

2010 ◽  
Vol 18 (17) ◽  
pp. 17788 ◽  
Author(s):  
Xuhuai Zhang ◽  
Marcelo Davanço ◽  
Kara Maller ◽  
Thomas W. Jarvis ◽  
Chihhui Wu ◽  
...  
Keyword(s):  
Near Infrared ◽  
Negative Index ◽  
Sub Wavelength

Highly Fluorescent Au25-xAgx Nanoclusters Protected with Poly(ethylene glycol) - and Zwitterion-Modified Thiolate Ligands

2018 ◽  
Author(s):  
Dinesh Mishra ◽  
Sisi Wang ◽  
Zhicheng Jin ◽  
Eric Lochner ◽  
Hedi Mattoussi
Keyword(s):  
Quantum Yield ◽  
Near Infrared ◽  
Small Diameter ◽  
Binding Energies ◽  
Thiolate Ligands ◽  
Nir Emission ◽  
Thiolate Complexes ◽  
Long Lifetime ◽  
Poly Ethylene

<p>We describe the growth and characterization of highly fluorescing, near-infrared-emitting nanoclusters made of bimetallic Au<sub>25-x</sub>Ag<sub>x</sub> cores, prepared using various monothiol-appended hydrophobic and hydrophilic ligands. The reaction uses well-defined triphenylphosphine-protected Au<sub>11</sub> clusters (as precursors), which are reacted with Ag(I)-thiolate complexes. The prepared nanoclusters are small (diameter < 2nm, as characterized by TEM) with emission peak at 760 nm and long lifetime (~12 µs). The quantum yield measured for these materials was 0.3 - 0.4 depending on the ligand. XPS measurements show the presence of both metal atoms in the core, with measured binding energies that agree with reported values for nanocluster materials. The NIR emission combined with high quantum yield, small size and ease of surface functionalization afforded by the coating, make these materials suitable to implement investigations that address fundamental questions and potentially useful for biological sensing and imaging applications.<br></p>

Sign in / Sign up

Export Citation Format

Share Document