High resolution, High contrast optical interface for defect qubits
- URL: http://arxiv.org/abs/2102.07046v1
- Date: Sun, 14 Feb 2021 01:50:51 GMT
- Title: High resolution, High contrast optical interface for defect qubits
- Authors: 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 and Je-Hyung Kim
- Abstract summary: 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.
Our approach can provide an efficient way for imaging and addressing closely-spaced defects with higher resolution and sensitivity.
- Score: 2.181654697819463
- License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
- Abstract: 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 ~${\lambda}$/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.
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