Quantum technologies in diamond enabled by laser processing
Quantum technologies in diamond enabled by laser processing
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DOI：
10.1063/5.0080348
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发表时间：
2022-01-10
影响因子：
4
通讯作者：
Eaton, S. M.
中科院分区：
文献类型：
--
作者：
Giakoumaki, A. N.;Coccia, G.;Eaton, S. M.
集成光子电路通过其限制和操纵光的能力，有望成为量子信息和传感技术应用的基础。自旋激活量子发射器可能在这些技术中发挥关键作用，它可用于存储量子信息或作为局部环境的敏感探针。一个主要的候选者是带负电荷的氮空位（NV-）金刚石色心，其基态自旋状态可以光学读出，在室温下表现出长（类似于1 ms）的相干时间。这些特性推动了对金刚石块体中光子电路集成的研究，并开发了允许制造光波导的技术。特别是，飞秒激光写入已经成为一种强大的技术，能够写入具有3D配置的光导结构以及创建NV复合物。在这个角度来看，激光加工金刚石背后的物理机制将进行审查。我们将分析单NV中心和整体NV中心的波导特性，以及将这种结构联合收割机结合到集成光子器件中的可能性，这种集成光子器件可以直接应用于量子信息和传感。(C)2022年作者。除非另有说明，否则所有文章内容均根据知识共享署名（CC BY）许可证（http：//creativecommons.org/licenses/by/4.0/）进行许可。
Integrated photonic circuits promise to be foundational for applications in quantum information and sensing technologies, through their ability to confine and manipulate light. A key role in such technologies may be played by spin-active quantum emitters, which can be used to store quantum information or as sensitive probes of the local environment. A leading candidate is the negatively charged nitrogen vacancy (NV-) diamond color center, whose ground spin state can be optically read out, exhibiting long (similar to 1 ms) coherence times at room temperature. These properties have driven research toward the integration of photonic circuits in the bulk of diamond with the development of techniques allowing fabrication of optical waveguides. In particular, femtosecond laser writing has emerged as a powerful technique, capable of writing light guiding structures with 3D configurations as well as creating NV complexes. In this Perspective, the physical mechanisms behind laser fabrication in diamond will be reviewed. The properties of waveguides, single- and ensemble-NV centers, will be analyzed, together with the possibility to combine such structures in integrated photonic devices, which can find direct application in quantum information and sensing. (C) 2022 Author(s). All article content, except where otherwise noted, is licensed under a Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).