Optical and microwave control of germanium-vacancy center spins in diamond
Optical and microwave control of germanium-vacancy center spins in diamond
复制标题
金刚石中锗空位中心自旋的光学和微波控制
DOI：
10.1103/physrevb.96.081201
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发表时间：
2017
影响因子：
3.7
通讯作者：
Yuri M.
中科院分区：
文献类型：
--
作者：
Siyushev;Metsch;Mathias H;Aroosa;Binder;Bhaskar;Mihir K;Sukachev;Denis D;Sipahigil;Ruffin E;Nguyen;Christian T;Mikhail D;Hemmer;Philip R;Palyanov;Yuri N;Kupriyanov;Igor N;Borzdov;Yuri M.
将稳定的自旋自由度与有效的光学界面相结合的固态系统作为集成量子光学和量子信息系统的元件是非常理想的。我们证明了在钻石中有一个明亮的色心，具有优异的光学性质和可控的电子自旋态。具体地说，我们对锗-空位()色心进行了详细的光学光谱研究，展示了光学光谱的稳定性。利用外加磁场提高电子自旋简并度，我们把自旋自由度作为一个可控的量子比特来研究。自旋极化是通过光抽运实现的，并证明了自旋弛豫时间超过。我们报道了自旋跃迁的共振微波控制，并用它作为探针测量了微波-光学双共振实验中的Autler-Townes效应。利用相干布居俘获方法制备了叠加自旋态，在2.0K温度下观察到纯退相时间约为2.0K。
A solid-state system combining a stable spin degree of freedom with an efficient optical interface is highly desirable as an element for integrated quantum-optical and quantum-information systems. We demonstrate a bright color center in diamond with excellent optical properties and controllable electronic spin states. Specifically, we carry out detailed optical spectroscopy of a germanium-vacancy () color center demonstrating optical spectral stability. Using an external magnetic field to lift the electronic spin degeneracy, we explore the spin degree of freedom as a controllable qubit. Spin polarization is achieved using optical pumping, and a spin relaxation time in excess ofis demonstrated. We report resonant microwave control of spin transitions, and use this as a probe to measure the Autler-Townes effect in a microwave-optical double-resonance experiment. Superposition spin states were prepared using coherent population trapping, and a pure dephasing time of aboutwas observed at a temperature of 2.0 K.