Coherent transfer of light polarization to electron spins in a semiconductor
Coherent transfer of light polarization to electron spins in a semiconductor
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DOI：
10.1103/physrevlett.100.096602
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发表时间：
2008-03-07
影响因子：
8.6
通讯作者：
Edamatsu, Keiichi
中科院分区：
文献类型：
--
作者：
Kosaka, Hideo;Shigyou, Hideki;Edamatsu, Keiichi
我们证明了在半导体量子阱中，光偏振态的叠加相干地转移到电子自旋上。利用时间分辨的克尔旋转，我们观察到相干性由光传递的电子自旋的拉莫尔旋进的初相。利用电子和光空穴的横向g因子存在较大的差异，打破了电子-空穴的自旋纠缠。这一结果鼓励我们在半导体中制作一个飞行光子量子比特和静止电子自旋量子比特之间的量子介质转换器。
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.