All-optical quantum thermometry based on spin-level cross-relaxation and multicenter entanglement under ambient conditions in SiC
All-optical quantum thermometry based on spin-level cross-relaxation and multicenter entanglement under ambient conditions in SiC
复制标题
SiC环境条件下基于自旋能级交叉弛豫和多中心纠缠的全光量子测温
DOI：
10.1063/1.5037158
复制
发表时间：
2018
期刊：
影响因子：
1.6
通讯作者：
P. Baranov
中科院分区：
文献类型：
--
作者：
A. Anisimov;V. Soltamov;I. Breev;R. A. Babunts;E. N. Mokhov;G. Astakhov;V. Dyakonov;D. Yakovlev;D. Suter;P. Baranov
介绍了基于碳化硅原子尺度自旋中心能级交叉弛豫的全光测温技术。这种技术利用了三态基态中心的零场分裂的巨大热位移，S=1，不被光致发光（所谓的“暗”中心）耦合到邻近的自旋-3/2中心（可以光学偏振和读出）（“亮”中心）所检测到，并且不需要射频场。EPR用于识别缺陷。交叉弛豫线的宽度几乎比全光测温中使用的激发态水平交叉线的宽度小一个数量级，并且由于激发态的寿命决定了交叉弛豫线的宽度不能明显减小。具有与激发态电平反交叉近似相同的温度位移和相同的信号强度，交叉松弛信号可以将温度测量的灵敏度提高一个数量级以上。在扫描共聚焦显微镜中，激光聚焦激发分配的体积约为1 μ3，温度灵敏度约为10 mK/Hz1/2。利用“亮”自旋-3/2中心和“暗”自旋-3 =1中心基态的交叉弛豫进行温度传感和“亮”自旋-3/2中心基态防交叉，可以在同一自旋系统中实现具有亚微米空间分辨率的集成磁场和温度传感器。在量子信息处理和环境条件下的多中心纠缠中，可以考虑由一系列“暗”S=1自旋连接的可单独寻址的“亮”自旋3/2中心的耦合。介绍了基于碳化硅原子尺度自旋中心能级交叉弛豫的全光测温技术。这种技术利用了三态基态中心的零场分裂的巨大热位移，S=1，不被光致发光（所谓的“暗”中心）耦合到邻近的自旋-3/2中心（可以光学偏振和读出）（“亮”中心）所检测到，并且不需要射频场。EPR用于识别缺陷。交叉弛豫线的宽度几乎比全光测温中使用的激发态水平交叉线的宽度小一个数量级，并且由于激发态的寿命决定了交叉弛豫线的宽度不能明显减小。交叉弛豫信号与激发态电平反交叉的温度位移和信号强度大致相同，可以使温度测量的灵敏度提高一个数量级以上。
All-optical thermometry technique based on the energy level cross-relaxation in atomic-scale spin centers in SiC is demonstrated. This technique exploits a giant thermal shift of the zero-field splitting for centers in the triplet ground state, S=1, undetected by photoluminescence (so called “dark” centers) coupling to neighbouring spin-3/2 centers which can be optically polarized and read out (“bright” centers), and does not require radiofrequency fields. EPR was used to identify defects. The width of the cross-relaxation line is almost an order of magnitude smaller than the width of the excited state level-anticrossing line, which was used in all-optical thermometry and which can not be significantly reduced since determined by the lifetime of the excited state. With approximately the same temperature shift and the same signal intensities as for excited state level-anticrossing, cross-relaxation signal makes it possible to increase the sensitivity of the temperature measurement by more than an order of magnitude. Temperature sensitivity is estimated to be approximately 10 mK/Hz1/2 within a volume about 1 μ3, allocated by focused laser excitation in a scanning confocal microscope. Using cross-relaxation in the ground states of “bright” spin-3/2 centers and “dark” S=1 centers for temperature sensing and ground state level anti-crossing of “bright” spin-3/2 centers an integrated magnetic field and temperature sensor with submicron space resolution can be implemented using the same spin system. The coupling of individually addressable “bright” spin-3/2 centers connected by a chain of “dark” S=1 spins, could be considered in quantum information processing and multicenter entanglement under ambient conditions.All-optical thermometry technique based on the energy level cross-relaxation in atomic-scale spin centers in SiC is demonstrated. This technique exploits a giant thermal shift of the zero-field splitting for centers in the triplet ground state, S=1, undetected by photoluminescence (so called “dark” centers) coupling to neighbouring spin-3/2 centers which can be optically polarized and read out (“bright” centers), and does not require radiofrequency fields. EPR was used to identify defects. The width of the cross-relaxation line is almost an order of magnitude smaller than the width of the excited state level-anticrossing line, which was used in all-optical thermometry and which can not be significantly reduced since determined by the lifetime of the excited state. With approximately the same temperature shift and the same signal intensities as for excited state level-anticrossing, cross-relaxation signal makes it possible to increase the sensitivity of the temperature measurement by more than an order of ...
登录
查看更多内容
影响因子：
12.5
作者：
Simin, D.;Soltamov, V. A.;Astakhov, G. V.
通讯作者：
Astakhov, G. V.
影响因子：
4.6
作者：
Kraus H;Soltamov VA;Fuchs F;Simin D;Sperlich A;Baranov PG;Astakhov GV;Dyakonov V
通讯作者：
Dyakonov V
基于碳化硅中的水平抗骨骼的光学温度计。
影响因子：
4.6
作者：
Anisimov AN;Simin D;Soltamov VA;Lebedev SP;Baranov PG;Astakhov GV;Dyakonov V
通讯作者：
Dyakonov V
影响因子：
41.2
作者：
Widmann, Matthias;Lee, Sang-Yun;Wrachtrup, Joerg
通讯作者：
Wrachtrup, Joerg