Nonlinear circular dichroism in GaAs nanowires partially covered by gold (Conference Presentation)

2019 ◽  
Author(s):  
Alessandro Belardini ◽  
Joel T. Collins ◽  
David C. Hooper ◽  
Grigore Leahu ◽  
Emilija Petronijevic ◽  
...  
Keyword(s):  
Circular Dichroism ◽  
Gaas Nanowires ◽  
Circular Dichroïsm

scholarly journals Circular Dichroism in the Second Harmonic Field Evidenced by Asymmetric Au Coated GaAs Nanowires

Micromachines ◽  
2020 ◽  
Vol 11 (2) ◽  
pp. 225
Author(s):  
Alessandro Belardini ◽  
Grigore Leahu ◽  
Emilija Petronijevic ◽  
Teemu Hakkarainen ◽  
Eero Koivusalo ◽  
...  
Keyword(s):  
Circular Dichroism ◽  
Symmetry Breaking ◽  
Second Harmonic ◽  
Low Cost ◽  
Nonlinear Process ◽  
Gaas Nanowires ◽  
Large Effort ◽  
Optical Circular Dichroism ◽  
Chiral Nanostructures ◽  
Circular Dichroïsm

Optical circular dichroism (CD) is an important phenomenon in nanophotonics, that addresses top level applications such as circular polarized photon generation in optics, enantiomeric recognition in biophotonics and so on. Chiral nanostructures can lead to high CD, but the fabrication process usually requires a large effort, and extrinsic chiral samples can be produced by simpler techniques. Glancing angle deposition of gold on GaAs nanowires can (NWs) induces a symmetry breaking that leads to an optical CD response that mimics chiral behavior. The GaAs NWs have been fabricated by a self-catalyzed, bottom-up approach, leading to large surfaces and high-quality samples at a relatively low cost. Here, we investigate the second harmonic generation circular dichroism (SHG-CD) signal on GaAs nanowires partially covered with Au. SHG is a nonlinear process of even order, and thus extremely sensitive to symmetry breaking. Therefore, the visibility of the signal is very high when the fabricated samples present resonances at first and second harmonic frequencies (i.e., 800 and 400 nm, in our case).

Characterization of Tamm-Horsfall Urinary Glycoprotein

1973 ◽  
Vol 31 ◽  
pp. 420-421
Author(s):  
John P. Robinson ◽  
J. David Puett
Keyword(s):  
Electron Microscopy ◽  
Circular Dichroism ◽  
Secondary Structure ◽  
Quaternary Structure ◽  
Normal Adult ◽  
Morphological Properties ◽  
Adult Males ◽  
Circular Dichroïsm ◽  
Urinary Glycoprotein

Much work has been reported on the chemical, physical and morphological properties of urinary Tamm-Horsfall glycoprotein (THG). Although it was once reported that cystic fibrotic (CF) individuals had a defective THG, more recent data indicate that THG and CF-THG are similar if not identical.No studies on the conformational aspects have been reported on this glycoprotein using circular dichroism (CD). We examined the secondary structure of THG and derivatives under various conditions and have correlated these results with quaternary structure using electron microscopy.THG was prepared from normal adult males and CF-THG from a 16-year old CF female by the method of Tamm and Horsfall. CF female by the method of Tamm and Horsfall.

Circular dichroism spectra of adsorbed dye-aggregates

1968 ◽  
Vol 65 ◽  
pp. 146-151 ◽  
Author(s):  
G. Scheibe ◽  
O. Wörz ◽  
F. Haimerl ◽  
W. Seiffert ◽  
J. Winkler
Keyword(s):  
Circular Dichroism ◽  
Circular Dichroism Spectra ◽  
Circular Dichroïsm

ON THE THEORY OF THREE PHOTONIC LINEAR CIRCULAR DICHROISM IN A HOLE-CONDUCTION SEMICONDUCTOR

2020 ◽  
pp. 73-76
Author(s):  
V. R. Rasulov ◽  
R. Y. Rasulov ◽  
I. M. Eshboltaev ◽  
R. R. Sultonov ◽  
B. Z. Polvonov
Keyword(s):  
Circular Dichroism ◽  
Hole Conduction ◽  
Circular Dichroïsm

Fan-shaped mid-infrared chiral metamaterials based on indium tin oxide and their circular dichroism

2020 ◽  
Vol 13 (4) ◽  
pp. 722-727
Author(s):  
ZHU Ye-xin ◽  
◽  
◽  
LI Ya-nan ◽  
SHI Wei-jie ◽  
...  
Keyword(s):  
Circular Dichroism ◽  
Tin Oxide ◽  
Indium Tin Oxide ◽  
Mid Infrared ◽  
Chiral Metamaterials ◽  
Circular Dichroïsm
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