Results 21 to 30 of about 423,461 (345)

Orientation Averaged Visible/Near‐Infrared and Mid‐Infrared Optical Constants of Hydrous Ca‐Sulfates: Gypsum and Bassanite

open access: yesEarth and Space Science, 2021
The hydrous Ca‐sulfates, gypsum and bassanite, have been detected on Mars using both visible/near‐infrared (VNIR) remote sensing measurements and in‐situ rover‐based mineralogical measurements.
Cheng Ye   +2 more
doaj   +1 more source

Variations in Infrared Complex Refractive Index Spectra of Surface Soils from Global Dust Entrainment Regions

open access: yesAtmosphere, 2023
We explored spectral diversity in infrared (IR, 4–25 μm) imaginary (k) and real (n) indices of refraction (optical constants) for 26 surface soils that originated from global dust entrainment regions.
Mohammad R. Sadrian   +4 more
doaj   +1 more source

To Study the Silver Concentration Effect on the Optical and Electrical Properties of the Ag/PMMA Composites [PDF]

open access: yesEngineering and Technology Journal, 2014
The present work was carried out to investigate the silver concentration Effect (Ag %)othe optical and the electrical properties of the polymethyl methacrylate (PMMA).
Nahida G.Hamed, Maraw Rahem
doaj   +1 more source

Dopping Effect On Optical Constants of Polymethylmethacrylate (PMMA) [PDF]

open access: yesEngineering and Technology Journal, 2007
The optical constants (refractive index (n) , extinction coefficient (k) , realand imaginary parts of dielectric constant(ε1&ε2)) of polymethyl methacrylate(PMMA) doped with methylene blue (mb) and methyl red (mr) withthickness in the range (0.1-0.2) mm ...
Ahmad H, Awatif M, Zeid N
doaj   +1 more source

On the Optical Properties of Cr2Ge2Te6 and Its Heterostructure

open access: yesCondensed Matter, 2023
Recently, there has been a growing interest in two-dimensional van der Waals (vdW) magnets owing to their unique two-dimensional magnetic phenomena and potential applications.
Hiroshi Idzuchi   +7 more
doaj   +1 more source

Precision Optical Measurements and Fundamental Physical Constants [PDF]

open access: yes, 2001
A brief overview is given on precision determinations of values of the fundamental physical constants and the search for their variation with time by means of precision spectroscopy in the optical ...
A Huber   +24 more
core   +3 more sources

Extensive study of magneto-optical and optical properties of Cd1−xMnxTe between 675 and 1025 nm

open access: yesAIP Advances, 2023
We determine Faraday rotations and measure the optical reflection and transmission from magneto-optical Cd1−xMnxTe crystals with various stoichiometric ratios. For wavelengths between 675 and 1025 nm, we derive Verdet constants, optical loss coefficients,
Christoph Tyborski   +4 more
doaj   +1 more source

Accurate determination of terahertz optical constants by vector network analyzer of Fabry-Perot response [PDF]

open access: yes, 2013
This paper was published in Optics Letters and is made available as an electronic reprint with the permission of OSA. The paper can be found at the following URL on the OSA website: http://dx.doi.org/10.1364/OL.38.005438.
Donnan, R   +4 more
core   +2 more sources

Determination of Optical Constants in the Mid-Infrared Spectral Range by use of the Attenuated Total Reflection Method [PDF]

open access: yesKemija u Industriji, 2010
Infrared (IR) spectroscopy is one of the most useful experimental methods in the investigation of hydrogen-bonded systems. However, application of transmission IR spectroscopy to aqueous systems is only of limited value due to the very strong water ...
Biliškov, N:
doaj  

Optical constants of sodium sulphide

open access: yesPhysica Status Solidi (a), 1979
Infrared and Raman measurements are reported. From these, real and imaginary parts of the dielectric constant, longitudinal and transverse optical mode, the static dielectric constant and the effective charge are calculated.
Montaner, Antoine   +3 more
openaire   +2 more sources

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