Optical modeling for millimeter and submillimeter-wave systems

2008 ◽  
Author(s):  
John A. Murphy ◽  
Marcin L. Gradziel ◽  
Creidhe O'Sullivan ◽  
Tully Peacocke ◽  
Neil Trappe ◽  
...  
Keyword(s):  
Submillimeter Wave ◽  
Optical Modeling

Overview of the Superconducting Submillimeter-Wave Limb-Emission Sounder (SMILES) and Sensitivity to Chlorine Monoxide, ClO

2012 ◽  
Vol 132 (8) ◽  
pp. 609-615 ◽  
Author(s):  
Makoto Suzuki ◽  
Chihiro Mitsuda ◽  
Kenichi Kikuchi ◽  
Toshiyuki Nishibori ◽  
Satoshi Ochiai ◽  
...  
Keyword(s):  
Submillimeter Wave ◽  
Chlorine Monoxide

Millimeter- and Submillimeter-Wave Band Receiver on Hot Electrons

2009 ◽  
Vol 68 (6) ◽  
pp. 549-554
Author(s):  
Yu. Ye. Kamenev ◽  
F. F. Sizov ◽  
V. N. Dobrovolsky
Keyword(s):  
Submillimeter Wave ◽  
Hot Electrons ◽  
Wave Band

scholarly journals Hyaluronan orders water molecules in its nanoscale extended hydration shells

2021 ◽  
Vol 7 (10) ◽  
pp. eabf2558
Author(s):  
J. Dedic ◽  
H. I. Okur ◽  
S. Roke
Keyword(s):  
Second Harmonic ◽  
Hydration Shell ◽  
Water Molecules ◽  
Temperature Dependent ◽  
Flexible Chain ◽  
Optical Modeling ◽  
Hydration Shells ◽  
Second Harmonic Scattering ◽  
Nuclear Quantum Effects ◽  
Extracellular Environment

Hyaluronan (HA) is an anionic, highly hydrated bio-polyelectrolyte found in the extracellular environment, like the synovial fluid between joints. We explore the extended hydration shell structure of HA in water using femtosecond elastic second-harmonic scattering (fs-ESHS). HA enhances orientational water-water correlations. Angle-resolved fs-ESHS measurements and nonlinear optical modeling show that HA behaves like a flexible chain surrounded by extended shells of orientationally correlated water. We describe several ways to determine the concentration-dependent size and shape of a polyelectrolyte in water, using the amount of water oriented by the polyelectrolyte charges as a contrast agent. The spatial extent of the hydration shell is determined via temperature-dependent measurements and can reach up to 475 nm, corresponding to a length of 1600 water molecules. A strong isotope effect, stemming from nuclear quantum effects, is observed when light water (H2O) is replaced by heavy water (D2O), amounting to a factor of 4.3 in the scattered SH intensity.

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