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repositories = "Linköping University Electronic Press"
> : "Physics" "TEKNIKVETENSKAP"
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Found 5 documents, displaying page 1 of 1
Instability and dynamics of two nonlinearly coupled laser beams in a plasma
Author(s) :
Shukla, Padma K
,
Eliasson, Bengt
,
Marklund, Mattias
,
Stenflo, Lennart
,
Kourakis, Ioannis
,
Parviainen, Madelene
Description :
The nonlinear interaction between two laser beams in a plasma is investigated in the weakly nonlinear and relativistic regime. The evolution of the laser beams is governed by two nonlinear Schrödinger equations that are coupled with the slow plasma density response. A nonlinear dispersion relation i...
Repository :
Linköping University Electronic Press
Language(s) :
English
Room-temperature spin injection and spin loss across a GaNAs/GaAs interface
Author(s) :
Puttisong, Yuttapoom
,
Wang, Xingjun
,
Buyanova, Irina
,
Tu, C W
,
Geelhaar, L
,
Riechert, H
,
Chen, Weimin
Description :
Recently discovered effect of spin-filtering and spin amplification in GaNAs enables us to reliably obtain detailed information on the degree of spin loss during optical spin injection across a semiconductor heterointerface at room temperature. Spin polarization of electrons injected from GaAs into ...
Repository :
Linköping University Electronic Press
Language(s) :
English
On the origin of suppression of free exciton no-phonon emission in ZnO tetrapods
Author(s) :
Chen, Shula
,
Kyun Lee, Sun
,
Chen, Weimin
,
Dong, H X
,
Sun, L
,
Chen, Z H
,
Buyanova, Irina
Description :
Temperature dependent photoluminescence and cathodoluminescence (CL) spectroscopies are employed to investigate free exciton (FX) emissions in ZnO tetrapods. The intensity of the no-phonon line is found to be largely suppressed as compared with longitudinal optical phonon assisted transitions, in sh...
Repository :
Linköping University Electronic Press
Language(s) :
English
Electron spin filtering by thin GaNAs/GaAs multiquantum wells
Author(s) :
Puttisong, Yuttapoom
,
Wang, Xingjun
,
Buyanova, Irina
,
Carrere, H
,
Zhao, F
,
Balocchi, A
,
Marie, X
,
Tu, C W
,
Chen, Weimin
Description :
Effectiveness of the recently discovered defect-engineered spin-filtering effect is closely examined in GaNAs/GaAs multiquantum wells (QWs) as a function of QW width. In spite of narrow well widths of 3-9 nm, rather efficient spin filtering is achieved at room temperature. It leads to electron spin ...
Repository :
Linköping University Electronic Press
Language(s) :
English
Long lifetime of free excitons in ZnO tetrapod structures
Author(s) :
Lee, Sun-Kyun
,
Chen, Shula L
,
Hongxing, D
,
Sun, L
,
Chen, Z
,
Chen, Weimin
,
Buyanova, Irina A
Description :
Time-resolved photoluminescence (PL) is employed to characterize optical quality of ZnO tetrapods. PL decay of free excitons (FE) is concluded to contain two components with time constants of 1 and 14 ns at room temperature. The fast PL decay is attributed to nonradiative recombination whereas the s...
Repository :
Linköping University Electronic Press
Language(s) :
English
1
Found 5 documents, displaying page 1 of 1