Results 71 to 80 of about 1,434,741 (177)

Polarization fluctuations in vertical cavity surface emitting lasers: a key to the mechanism behind polarization stability

open access: yes, 1997
We investigate the effects of the electron-hole spin dynamics on the polarization fluctuations in the light emitted from a vertical cavity surface emitting laser (VCSEL).
Holger F Hofmann   +4 more
core   +1 more source

Effect of oceanic turbulence on the statistical features of electromagnetic optical beam

open access: yesResults in Physics
This work deals with the intricate problem of electromagnetic optical beam propagation through oceanic turbulence. Using the extended Huygens–Fresnel principle, numerically, the behavior of the degree of cross-polarization (DOCP), electromagnetic degree ...
Hemant Kumar Singh   +2 more
doaj   +1 more source

Spin Texture in a Cold Exciton Gas

open access: yes, 2012
We report on the observation of a spin texture in a cold exciton gas in a GaAs/AlGaAs coupled quantum well structure. The spin texture is observed around the exciton rings. The observed phenomena include: a ring of linear polarization, a vortex of linear
A. A. High   +13 more
core   +5 more sources

Determination of nonlinear optical coefficients and efficient type-II second-harmonic-generation for TmCOB crystals

open access: yesResults in Physics, 2020
By Maker Fringe (MF) method, all of the nonlinear optical (NLO) coefficients including d11, d12, d13, d31, d32 and d33 of TmCa4O(BO3)3 (TmCOB) crystals were measured to be 0.19, 0.26, −0.61, −0.30, 1.66 and −1.25 pm/V, respectively.
Yanqing Liu   +10 more
doaj   +1 more source

Optical polarization of nuclear ensembles in diamond

open access: yes, 2013
We report polarization of a dense nuclear-spin ensemble in diamond and its dependence on magnetic field and temperature. The polarization method is based on the transfer of electron spin polarization of negatively charged nitrogen vacancy color centers ...
Budker, Dmitry   +3 more
core   +1 more source

QCD corrections to polarization of J/\psi and \Upsilon at Fermilab Tevatron and CERN LHC

open access: yes, 2008
In this work, we present more detail of the calculation on the NLO QCD corrections to polarization of direct J/psi production via color singlet at Tevatron and LHC, as well as the results for Upsilon for the first time.
Bin Gong   +3 more
core   +1 more source

Gamma-ray polarization induced by cold electrons via Compton processes

open access: yes, 2013
The polarization measurement is an important tool to probe the prompt emission mechanism in gamma-ray bursts (GRBs). The synchrotron photons can be scattered by cold electrons in the outflow via Compton scattering processes.
Chang, Zhe, Jiang, Yunguo, Lin, Hai-Nan
core   +1 more source

Optical and Near-Infrared Polarimetry of Highly Reddened Type Ia Supernova 2014J: Peculiar Properties of Dust in M82

open access: yes, 2014
We presented optical and near-infrared multi-band linear polarimetry of the highly reddened Type Ia SN~2014J appeared in M82. SN~2014J exhibits large polarization at shorter wavelengths, e.g., $4.8$\% in $B$ band, and the polarization decreases rapidly ...
Akitaya, H.   +48 more
core   +1 more source

Measurement of the Crab nebula polarization at 90 GHz as a calibrator for CMB experiments

open access: yes, 2010
CMB experiments aiming at a precise measurement of the CMB polarization, such as the Planck satellite, need a strong polarized absolute calibrator on the sky to accurately set the detectors polarization angle and the cross-polarization leakage.
Baars   +41 more
core   +3 more sources

Quantitative Analysis of 4 × 4 Mueller Matrix Transformation Parameters for Biomedical Imaging

open access: yesPhotonics, 2019
Mueller matrix polarimetry is a potentially powerful technique for obtaining microstructural information of biomedical specimens. Thus, it has found increasing application in both backscattering imaging of bulk tissue samples and transmission microscopic
Wei Sheng   +9 more
doaj   +1 more source

Home - About - Disclaimer - Privacy