TY - JOUR
T1 - Measurement of electron spin states in a semiconductor quantum well using tomographic Kerr rotation
AU - Inagaki, Takahiro
AU - Kosaka, Hideo
AU - Rikitake, Yoshiaki
AU - Imamura, Hiroshi
AU - Mitsumori, Yasuyoshi
AU - Edamatsu, Keiichi
N1 - Copyright:
Copyright 2010 Elsevier B.V., All rights reserved.
PY - 2010/4
Y1 - 2010/4
N2 - Spin coherence is essential for spin-based quantum information technology. The conventional spin measurement technique, however, requires an extra step of spin manipulation or precession to measure the electron spin coherence. To measure the electron spin coherence directly, we have developed the tomographic Kerr rotation (TKR) method, which is based on the magneto-optical Kerr effect on the condition of the coherent transfer of light polarization states into electron spin states in a GaAs/AlGaAs quantum well. The TKR method allows measurement of the coherent superposition state of electron spins l±y>e = (l↑>e±il↓> e)/√2 in addition to conventionally measured ±z states (l↑>e or l↓>e) (which merely indicate the population of electron spins). Here we demonstrate that electron spin coherence can be measured by linearly polarized probe light to show that TKR is independent of the choice of probe light polarization. We also describe a method to distinguish TKR from the conventional magnetic circular dichroism (MCD) effect.
AB - Spin coherence is essential for spin-based quantum information technology. The conventional spin measurement technique, however, requires an extra step of spin manipulation or precession to measure the electron spin coherence. To measure the electron spin coherence directly, we have developed the tomographic Kerr rotation (TKR) method, which is based on the magneto-optical Kerr effect on the condition of the coherent transfer of light polarization states into electron spin states in a GaAs/AlGaAs quantum well. The TKR method allows measurement of the coherent superposition state of electron spins l±y>e = (l↑>e±il↓> e)/√2 in addition to conventionally measured ±z states (l↑>e or l↓>e) (which merely indicate the population of electron spins). Here we demonstrate that electron spin coherence can be measured by linearly polarized probe light to show that TKR is independent of the choice of probe light polarization. We also describe a method to distinguish TKR from the conventional magnetic circular dichroism (MCD) effect.
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U2 - 10.1143/JJAP.49.04DJ09
DO - 10.1143/JJAP.49.04DJ09
M3 - Article
AN - SCOPUS:77952691225
VL - 49
JO - Japanese Journal of Applied Physics, Part 1: Regular Papers & Short Notes
JF - Japanese Journal of Applied Physics, Part 1: Regular Papers & Short Notes
SN - 0021-4922
IS - 4 PART 2
M1 - 04DJ09
ER -