Zero-field optical manipulation of magnetic ions in semiconductors.
Zero-field optical manipulation of magnetic ions in semiconductors.
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DOI：
10.1038/nmat2123
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发表时间：
2008-03
期刊：
影响因子：
41.2
通讯作者：
Roberto C. Myers;M. Mikkelsen;Jian-Ming Tang;Jian-Ming Tang;A. Gossard;M. Flatté;D. Awschalom
中科院分区：
文献类型：
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作者：
Roberto C. Myers;M. Mikkelsen;Jian-Ming Tang;Jian-Ming Tang;A. Gossard;M. Flatté;D. Awschalom
控制和监测单个自旋对于构建基于自旋的设备以及实现量子信息处理方案是期望的。与冷气体中的捕获离子一样，半导体晶格上捕获的磁性离子具有均匀的性质和相对较长的自旋寿命。此外，半导体中的稀释磁矩可以与周围的主体强烈耦合，从而允许光学或电学自旋操纵。在这里，我们描述了零场光学操纵的几百个锰离子在一个单一的砷化镓量子阱。光学产生的移动的电子自旋动态地产生离子自旋的能量分裂，并且仅通过改变光子螺旋度或能量来实现磁矩取向。这些极化的锰自旋在横向场中进动，使得能够测量自旋寿命。随着磁性离子浓度的降低和锰自旋寿命的增加，砷化镓中单个锰自旋的相干光学控制和读出应该是可能的。
Controlling and monitoring individual spins is desirable for building spin-based devices, as well as implementing quantum information processing schemes. As with trapped ions in cold gases, magnetic ions trapped on a semiconductor lattice have uniform properties and relatively long spin lifetimes. Furthermore, diluted magnetic moments in semiconductors can be strongly coupled to the surrounding host, permitting optical or electrical spin manipulation. Here we describe the zero-field optical manipulation of a few hundred manganese ions in a single gallium arsenide quantum well. Optically created mobile electron spins dynamically generate an energy splitting of the ion spins and enable magnetic moment orientation solely by changing either photon helicity or energy. These polarized manganese spins precess in a transverse field, enabling measurements of the spin lifetimes. As the magnetic ion concentration is reduced and the manganese spin lifetime increases, coherent optical control and readout of single manganese spins in gallium arsenide should be possible.