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arXiv 2102.07046quant-phphysics.optics
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用于缺陷量子位的高分辨率、高对比度光学接口

High resolution, High contrast optical interface for defect qubits

Jong Sung Moon, Haneul Lee, Jin Hee Lee, Woong Bae Jeon, Dowon Lee, Junghyun Lee, Seoyoung Paik, Sang-Wook Han, Rolf Reuter, Andrej Denisenko, Joerg Wrachtrup, … 展开作者

Jong Sung Moon, Haneul Lee, Jin Hee Lee, Woong Bae Jeon, Dowon Lee, Junghyun Lee, Seoyoung Paik, Sang-Wook Han, Rolf Reuter, Andrej Denisenko, Joerg Wrachtrup, Sang-Yun Lee, Je-Hyung Kim

摘要:

晶体中的点缺陷为量子应用提供了重要的基础。为了初始化、控制和读出它们的量子态,需要一种用于利用光子寻址缺陷的有效光学接口。然而,传统的共焦荧光显微镜与高折射率晶体有限的光子收集效率和空间分辨率。在这里,我们展示了高分辨率,高对比度成像缺陷量子位使用微球辅助共聚焦显微镜。微球为点缺陷提供了一个极好的光学界面,具有放大的虚像,可将空间分辨率提高至~ $λ$ /5,并将光学信噪比提高4倍。这些功能使单独的光学寻址的单光子和单自旋的空间未解决的缺陷,在传统的共焦显微镜与改善的信号对比度。组合光镊显示定位或扫描微球的可能性,用于确定性耦合和宽场成像的缺陷。该方法不需要任何复杂的制造和额外的光学系统,但使用简单的显微光学现成的。从这些独特的优点的微球,我们的方法可以提供一个有效的方式成像和解决密集的缺陷,具有更高的分辨率和灵敏度。

英文摘要:

Point defects in crystals provide important building blocks for quantum applications. To initialize, control, and read-out their quantum states, an efficient optical interface for addressing defects with photons is required. However, conventional confocal fluorescence microscopy with high refractive index crystals has limited photon collection efficiency and spatial resolution. Here, we demonstrate high resolution, high contrast imaging for defects qubits using microsphere-assisted confocal microscopy. A microsphere provides an excellent optical interface for point defects with a magnified virtual image that improves spatial resolution up to ~$λ$/5 as well as an optical signal-to-noise ratio by four times. These features enable individual optical addressing of single photons and single spins of spatially-unresolved defects in conventional confocal microscopy with improved signal contrast. The combined optical tweezers show the possibility of positioning or scanning the microspheres for deterministic coupling and wide-field imaging of defects. The approach does not require any complicated fabrication and additional optical system but uses simple micro-optics off-the-shelf. From these distinctive advantages of the microspheres, our approach can provide an efficient way for imaging and addressing closely-spaced defects with higher resolution and sensitivity.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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