2,300 research outputs found
Radiative corrections to the magnetic-dipole transition amplitude in B-like ions
The one-electron quantum-electrodynamic corrections to the magnetic-dipole
transition amplitude between the fine-structure levels (1s^2 2s^2 2p) ^2P_3/2 -
^2P_1/2 in boronlike ions are calculated to all orders in (\alpha Z). The
results obtained serve for improving the theoretical accuracy of the lifetime
of the (1s^2 2s^2 2p) ^2P_3/2 level in boronlike argon
Time-resolved and continuous-wave optical spin pumping of semiconductor quantum wells
Experimental and theoretical studies of all-optical spin pump and probe of
resident electrons in CdTe/(Cd,Mg)Te semiconductor quantum wells are reported.
A two-color Hanle-MOKE technique (based on continuous-wave excitation) and
time-resolved Kerr rotation in the regime of resonant spin amplification (based
on pulsed excitation) provide a complementary measure of electron spin
relaxation time. Influence of electron localization on long-lived spin
coherence is examined by means of spectral and temperature dependencies.
Various scenarios of spin polarization generation (via the trion and exciton
states) are analyzed and difference between continuous-wave and pulsed
excitations is considered. Effects related to inhomogeneous distribution of
-factor and anisotropic spin relaxation time on measured quantities are
discussed.Comment: 26 pages, 19 figures, submitted to special issue on Optical
Orientation of Semiconductor Science and Technolog
- …