Results 61 to 70 of about 5,202,506 (244)

The study of sound absorption coefficient of aluminium nanocomposites

طب کار, 2017
Background Sound is one of the most important work-related risk factors and most widespread physical factors threatening the health of workers. Almost one of the best ways to control the sound, is sound absorber.
Abolfazl Barkhordari, Asiye Abbasi, , , Ali Jebali   +4 more
doaj  

Nonlinear acousto-electric transport in a two-dimensional electron system

, 2000
We study both theoretically and experimentally the nonlinear interaction between an intense surface acoustic wave and a two-dimensional electron plasma in semiconductor-piezocrystal hybrid structures.
A. L. Belostotskii, A. L. Efros, A. O. Govorov, A. V. Chaplik, A. V. Chaplik, A. V. Kalameitsev, A. Wixforth, A. Wixforth, B. A. Auld, C. W. Skorupka, E. Yablonovich, G. R. Nash, G. Weinreich, I. L. Drichko, I. L’Heureux, J. M. Shilton, J. P. Kotthaus, J. R. A. Beale, K. A. Ingebrigtsen, K.-H. Hoffmann, L. I. Magarill, M. J. Hoskins, M. K. Balakirev, M. K. Balakirev, M. Rotter, M. Rotter, M. Rotter, M. Rotter, M. Rotter, N. Botkin, P. K. Tien, P. N. Butcher, R. C. Ho, R. L. Willett, R. M. White, S. H. Simon, V. G. Mozhaev, V. I. Fal’ko, V. I. Talyanskii, V. L. Gurevich, V. L. Gurevich, W. J. Tanski, Yu. V. Gulyaev, Yu. V. Gulyaev   +43 more
core   +2 more sources

Comprehensive study of absorption coefficient and charge carrier generation in methylammonium lead iodide perovskite solar cells

Results in Physics
This study investigates the mechanisms of photon absorption and the rate of charge carrier generation in methylammonium lead iodide (MAPbI3) perovskite solar cells.
Hamid Shahivandi
doaj   +1 more source

Thermal cyclotron absorption coefficients

The Astrophysical Journal Supplement Series, 1989
The accuracy of some of the analytic formulas for thermal cyclotron absorption coefficients is checked for temperatures in the range of 5-50 keV. It is suggested that the Robinson and Melrose (1984) analytic formulas provide the best accuracy for these absorption coefficients at large viewing angles theta with the magnetic field and sufficiently high ...
G. Chanmugam, Kinwah Wu, M. W. Courtney, P. E. Barrett   +3 more
openaire   +1 more source

Magnetic Dipole Absorption of Radiation in Small Conducting Particles

, 1997
We give a theoretical treatment of magnetic dipole absorption of electromagnetic radiation in small conducting particles, at photon energies which are large compared to the single particle level spacing, and small compared to the plasma frequency.
Akkermans E, Ashcroft N W, Austin E J, Bernhard Mehlig, Carr G L, Gorkov L P, Kamenev A, Landau L D, Mehlig B, Mehlig B, Michael Wilkinson, Mie G, Paul N Walker, van Kampen N G, Wilkinson M, Wilkinson M   +15 more
core   +2 more sources

Optical Goniometer Paired with Digital Monte Carlo Twin to Determine the Optical Properties of Turbid Media

Sensors
We present a goniometer designed for capturing spectral and angular-resolved data from scattering and absorbing media. The experimental apparatus is complemented by a comprehensive Monte Carlo simulation, meticulously replicating the radiative transport ...
Levin Stolz, Benedikt Beutel, Alwin Kienle, Florian Foschum   +3 more
doaj   +1 more source

Two-photon absorption in potassium niobate

, 2001
We report measurements of thermal self-locking of a Fabry-Perot cavity containing a potassium niobate (KNbO3) crystal. We develop a method to determine linear and nonlinear optical absorption coefficients in intracavity crystals by detailed analysis of ...
A. D. Ludlow, An, Arie, Busse, Douillet, Drever, Dube, Ghosh, Goldberg, H. M. Nelson, Mabuchi, Polzik, S. D. Bergeson, Shiv   +13 more
core   +1 more source

Estimation of flattening coefficient for absorption and circular dichroism using simulation [PDF]

, 2009
The absorbance and circular dichroism (CD) of suspensions is lower than if the same amount of chromophore were uniformly distributed throughout the medium. Several mathematical treatments of this absorption flattening phenomenon have been presented using
Braun, Bustamante, Castiglioni, Castiglioni, Castiglioni, Castillo, Duysens, Ganesan, Gordon, Kelly, Latimer, Naqvi, Peter J. Halling, Sarmento, Teeters, Urry, Wallace, Wallace, Wittung   +18 more
core   +1 more source

Temperature dependent refractive index and absorption coefficient of congruent lithium niobate crystals in the terahertz range.

Optics Express, 2015
Optical rectification with tilted pulse fronts in lithium niobate crystals is one of the most promising methods to generate terahertz (THz) radiation. In order to achieve higher optical-to-THz energy efficiency, it is necessary to cryogenically cool the ...
Xiaojun Wu, Chun Zhou, W. Huang, F. Ahr, F. Kärtner   +4 more
semanticscholar   +1 more source

InAs/InAsSb Strained-Layer Superlattice Mid-Wavelength Infrared Detector for High-Temperature Operation

Micromachines, 2019
This paper reports an InAs/InAsSb strained-layer superlattice (SLS) mid-wavelength infrared detector and a focal plane array particularly suited for high-temperature operation. Utilizing the nBn architecture, the detector structure was grown by molecular
Gamini Ariyawansa, Joshua Duran, Charles Reyner, John Scheihing   +3 more
doaj   +1 more source