One- and two-dimensional photonic crystal microcavities in single crystal diamond
One- and two-dimensional photonic crystal microcavities in single crystal diamond
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DOI：
10.1038/nnano.2011.190
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发表时间：
2012-01-01
影响因子：
38.3
通讯作者：
Becher, Christoph
中科院分区：
文献类型：
--
作者：
Riedrich-Moeller, Janine;Kipfstuhl, Laura;Becher, Christoph
钻石是一种极具吸引力的光子量子技术材料，因为它的色心具有许多优异的性质，包括明亮的单光子发射和长自旋相干时间。为了利用这些特性，直接在高质量的金刚石样品中制造光学微腔是有利的。这样的微腔可以用来控制颜色中心发射的光子，或者用来耦合相距很远的自旋。在这里，我们提出了一种在单晶金刚石中制作一维和二维光子晶体微腔的方法，其品质因数高达700。利用后处理刻蚀技术，我们将腔模调谐为与硅空位色心系综的零声子线共振，测得强度增强因子为2.8。色心与光子晶体微腔的受控耦合可能为基于单晶钻石的更大规模的光子量子器件铺平道路。
Diamond is an attractive material for photonic quantum technologies because its colour centres have a number of outstanding properties, including bright single photon emission and long spin coherence times. To take advantage of these properties it is favourable to directly fabricate optical microcavities in high-quality diamond samples. Such microcavities could be used to control the photons emitted by the colour centres or to couple widely separated spins. Here, we present a method for the fabrication of one-and two-dimensional photonic crystal microcavities with quality factors of up to 700 in single crystal diamond. Using a post-processing etching technique, we tune the cavity modes into resonance with the zero phonon line of an ensemble of silicon-vacancy colour centres, and we measure an intensity enhancement factor of 2.8. The controlled coupling of colour centres to photonic crystal microcavities could pave the way to larger-scale photonic quantum devices based on single crystal diamond.