Coherent transfer of light polarization to electron spins in a semiconductor.
We demonstrate that the superposition of light polarization states is coherently transferred to electron spins in a semiconductor quantum well. By using time-resolved Kerr rotation, we observe the initial phase of Larmor precession of electron spins whose coherence is transferred from light. To break the electron-hole spin entanglement, we utilized the big discrepancy between the transverse g factors of electrons and light-holes. The result encourages us to make a quantum media converter between flying photon qubits and stationary electron-spin qubits in semiconductors.
Kosaka
Hideo
H
Laboratory for Nanoelectronics and Spintronics, Research Institute of Electrical Communication, Tohoku University, Sendai 980-8577, Japan.
Shigyou
Hideki
H
Mitsumori
Yasuyoshi
Y
Rikitake
Yoshiaki
Y
Imamura
Hiroshi
H
Kutsuwa
Takeshi
T
Arai
Koichiro
K
Edamatsu
Keiichi
K