Photophysics of chromium-related diamond single-photon emitters
Photophysics of chromium-related diamond single-photon emitters
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DOI：
10.1103/physreva.81.043813
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发表时间：
2010-04-01
影响因子：
2.9
通讯作者：
Prawer, S.
中科院分区：
文献类型：
--
作者：
Aharonovich, I.;Castelletto, S.;Prawer, S.
详细研究了化学气相沉积金刚石中产生的几种与铬有关的色心的物理化学性质。这些发光体在740-770 nm范围内显示出窄的发光线。通过连续和脉冲激发验证了单光子发射，饱和时检测到的发射速率在（2-3）x 10（6）计数/秒的范围内，而直接寿命测量显示不同中心的激发态寿命为1-14 ns。此外，一些量子发射体表现出二能级行为，在二阶相关函数中不存在聚束。三能级系统显示典型的光致发光线的半高宽类似于4 nm，而两能级发射体在室温下具有类似于10 nm的半高宽。此外，两能级系统的量子效率比三能级系统的量子效率高4倍。
A detailed study of the photophysical properties of several chromium-related color centers produced within chemical vapor deposition diamond is presented. These emitters show narrow luminescence lines in the range of 740-770 nm. Single-photon emission was verified with continuous and pulsed excitation with detected emission rates at saturation in the range of (2-3) x 10(6) counts/s, while direct lifetime measurements reveal excited state lifetimes for the distinct centers ranging 1-14 ns. In addition, a number of quantum emitters demonstrate two-level behavior with no bunching present in the second-order correlation function. The three-level systems revealed typically photoluminescence lines with width half-maximum of similar to 4 nm while the two-level emitters have full width half-maximum of similar to 10 nm at room temperature. In addition, the quantum efficiency of the two-level system was measured to be four times higher than that of the three-level system.