Direct observation of coherent spin transfer processes in an InGaAs/GaAs quantum well via two-color time-resolved Kerr rotation measurements

2008 ◽  
Vol 23 (7) ◽  
pp. 075021 ◽  
Author(s):  
X Z Ruan ◽  
B Q Sun ◽  
Yang Ji ◽  
W Yang ◽  
J H Zhao ◽  
...  
Keyword(s):  
Quantum Well ◽  
Direct Observation ◽  
Spin Transfer ◽  
Kerr Rotation ◽  
Time Resolved ◽  
Transfer Processes ◽  
Coherent Spin

Effective Nuclear Field Measurement in a Single Quantum Well via Time-Resolved Kerr Rotation Technique

2014 ◽  
Vol 936 ◽  
pp. 534-539
Author(s):  
Li Ping Yan ◽  
Reina Kaji ◽  
Satoru Adachi
Keyword(s):  
Magnetic Field ◽  
Quantum Well ◽  
Spin Polarization ◽  
Electron Spin ◽  
Electron Spin Polarization ◽  
Spin Component ◽  
Kerr Rotation ◽  
Time Resolved ◽  
Dephasing Time ◽  
Nuclear Field

Effective magnetic field of nuclear spin polarization (NSP) under circularly polarized pumps excitation and the dephasing time of resident electron spin polarization under pump and control excitation has been detected in a single CdTe quantum well (QW) by a time-resolved Kerr rotation (TRKR) technique. We deduced that the experimental method is verified with the effect, to a certain extent, through confirming the external magnetic field results. In addition, the nuclear field is revealed to be increased with the increasing electron spin component due to the enhanced electron-nuclear hyperfine interaction. Significant nuclear field is observed as 1.85 mT with the applied magnetic field tilted by about 15 degree. What is more, we found the spin dephasing time (SDT) has little relation with the created NSP field, but it decreases largely with the increasing spin polarization magnitude under pump excitation and the spin vector dispersions induced by control pulses.

scholarly journals Time‐resolved study of intervalence band thermalization in a GaAs quantum well

1996 ◽  
Vol 68 (21) ◽  
pp. 2956-2958 ◽  
Author(s):  
A. M. T. Kim ◽  
S. Hunsche ◽  
T. Dekorsy ◽  
H. Kurz ◽  
K. Köhler
Keyword(s):  
Quantum Well ◽  
Time Resolved

Nonexponential decoherence of collective spin states in 2DES probed by time-resolved Kerr rotation

2021 ◽  
pp. 114285
Author(s):  
E. Stepanets-Khussein ◽  
L.I. Musina ◽  
A.V. Larionov ◽  
A.S. Zhuravlev ◽  
I.V. Kukushkin ◽  
...  
Keyword(s):  
Spin States ◽  
Kerr Rotation ◽  
Time Resolved

scholarly journals Horizontal versus vertical charge and energy transfer in hybrid assemblies of semiconductor nanoparticles

2012 ◽  
Vol 3 ◽  
pp. 629-636 ◽  
Author(s):  
Gilad Gotesman ◽  
Rahamim Guliamov ◽  
Ron Naaman
Keyword(s):  
Energy Transfer ◽  
Charge Transfer ◽  
Horizontal Plane ◽  
Quartz Substrate ◽  
Vertical Direction ◽  
Time Resolved ◽  
Transfer Processes ◽  
Donor And Acceptor ◽  
Hybrid Assemblies ◽  
Time Resolved Photoluminescence

We studied the photoluminescence and time-resolved photoluminescence from self-assembled bilayers of donor and acceptor nanoparticles (NPs) adsorbed on a quartz substrate through organic linkers. Charge and energy transfer processes within the assemblies were investigated as a function of the length of the dithiolated linker (DT) between the donors and acceptors. We found an unusual linker-length-dependency in the emission of the donors. This dependency may be explained by charge and energy transfer processes in the vertical direction (from the donors to the acceptors) that depend strongly on charge transfer processes occurring in the horizontal plane (within the monolayer of the acceptor), namely, parallel to the substrate.

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