Evidence for the contribution of water dimers to the near-IR water vapour self-continuum

2008 ◽  
Vol 109 (5) ◽  
pp. 831-852 ◽  
Author(s):  
Igor V. Ptashnik
Keyword(s):  
Water Vapour ◽  
Near Ir ◽  
Water Dimers

Interaction energy of water dimers from pressure broadening of near-IR absorption lines

2008 ◽  
Vol 462 (4-6) ◽  
pp. 188-191 ◽  
Author(s):  
Phyllis A.Y. Fiadzomor ◽  
Anthony M. Keen ◽  
Robert B. Grant ◽  
Andrew J. Orr-Ewing
Keyword(s):  
Interaction Energy ◽  
Absorption Lines ◽  
Ir Absorption ◽  
Pressure Broadening ◽  
Near Ir ◽  
Water Dimers

Water vapour self-continuum and water dimers: 1. Analysis of recent work

2011 ◽  
Vol 112 (8) ◽  
pp. 1286-1303 ◽  
Author(s):  
I.V. Ptashnik ◽  
K.P. Shine ◽  
A.A. Vigasin
Keyword(s):  
Recent Work ◽  
Water Vapour ◽  
Water Dimers

scholarly journals Infrared and Submillimetre Observing Conditions on the Antarctic Plateau

2000 ◽  
Vol 17 (3) ◽  
pp. 260-269 ◽  
Author(s):  
Marton G. Hidas ◽  
Michael G. Burton ◽  
Matthew A. Chamberlain ◽  
John W. V. Storey
Keyword(s):  
Water Vapour ◽  
Precipitable Water ◽  
Atmospheric Transmission ◽  
Precipitable Water Vapour ◽  
Water Vapour Content ◽  
Antarctic Plateau ◽  
Near Ir ◽  
The Antarctic ◽  
Determining Factor

AbstractThe Antarctic Plateau provides the best terrestrial sites for infrared (IR) and submillimetre (sub-mm) astronomy. In this paper we examine the relative importance of temperature, aerosol content and precipitable water vapour to determine which parameters have the greatest influence on atmospheric transmission and sky brightness. We use the atmospheric modelling program MODTRAN to model the observed sky spectrum at the South Pole from the near-IR to the sub-mm. We find that temperature and aerosol content determine the quality of near-IR observing conditions, aerosol content is the determining factor in the mid-IR up to 20 μm, while at longer wavelengths, including the sub-mm, it is the water vapour content that matters. Finding a location where aerosol levels are minimised is a key constraint in determining the optimum site on the Antarctic Plateau for an IR observatory.

Surface Brightness Scale of Galactic Cepheids

1999 ◽  
Vol 190 ◽  
pp. 561-562
Author(s):  
G. P. Di Benedetto
Keyword(s):  
Surface Brightness ◽  
Variable Stars ◽  
Giant Stars ◽  
Near Ir

An accurate calibration of the surface brightness scaleSVas a function of the near-IR color (V–K) has been recently measured for non-variable Galactic dwarf and giant stars. It can be shown that this correlation can be applied to theSVscale of Galactic Cepheid variable stars, which are of major cosmological interest.

Plasmon-assisted interaction of Si with light, for cancer hyperthermia and electromagnetic energy harvest

2020 ◽  
Vol 92 (2) ◽  
pp. 20101
Author(s):  
Behnam Kheyraddini Mousavi ◽  
Morteza Rezaei Talarposhti ◽  
Farshid Karbassian ◽  
Arash Kheyraddini Mousavi
Keyword(s):  
Silicon Nanowires ◽  
Metallic Nanoparticles ◽  
Near Infrared ◽  
Optical Transition ◽  
Electromagnetic Energy ◽  
Energy Harvest ◽  
Absorption Enhancement ◽  
Ir Absorption ◽  
Absorption Mechanism ◽  
Near Ir

Metal-assisted chemical etching (MACE) is applied for fabrication of silicon nanowires (SiNWs). We have shown the effect of amorphous sheath of SiNWs by treating the nanowires with SF6 and the resulting reduction of absorption bandwidth, i.e. making SiNWs semi-transparent in near-infrared (IR). For the first time, by treating the fabricated SiNWs with copper containing HF∕H2O2∕H2O solution, we have generated crystalline nanowires with broader light absorption spectrum, up to λ = 1 μm. Both the absorption and photo-luminescence (PL) of the SiNWs are observed from visible to IR wavelengths. It is found that the SiNWs have PL at visible and near Infrared wavelengths, which may infer presence of mechanisms such as forbidden gap transitions other can involvement of plasmonic resonances. Non-radiative recombination of excitons is one of the reasons behind absorption of SiNWs. Also, on the dielectric metal interface, the absorption mechanism can be due to plasmonic dissipation or plasmon-assisted generation of excitons in the indirect band-gap material. Comparison between nanowires with and without metallic nanoparticles has revealed the effect of nanoparticles on absorption enhancement. The broader near IR absorption, paves the way for applications like hyperthermia of cancer while the optical transition in near IR also facilitates harvesting electromagnetic energy at a broad spectrum from visible to IR.

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