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2D NMR: Heteronuclear Single-Quantum Correlation Spectroscopy (HSQC)

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Heteronuclear single-quantum correlation spectroscopy (HSQC) is a 2D NMR technique that reveals one-bond correlations between hydrogen and a heteronucleus. The HSQC experiment is similar to the heteronuclear correlation experiment (HETCOR) but is more sensitive. In the HSQC spectrum, the proton chemical shift is plotted on the horizontal F2 axis, while the 13C chemical shift is plotted on the vertical F1 axis. The corresponding proton and 13C spectra are also shown. The HSQC contour plot does...

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Related Experiment Video

Updated: May 5, 2026

Demonstration of Spin-Multiplexed and Direction-Multiplexed All-Dielectric Visible Metaholograms

Demonstration of Spin-Multiplexed and Direction-Multiplexed All-Dielectric Visible Metaholograms

Published on: September 25, 2020

Quantum Nonlocal Holography via Multichannel Metasurfaces.

Qiuying Li¹, Minggui Liang¹, Shuangchun Wen¹

¹Laboratory for Spin Photonics, School of Physics and Electronics, Hunan University, Changsha 410082, China.

|May 4, 2026

Summary

This summary is machine-generated.

Quantum nonlocal holography using multichannel metasurfaces (QNHM) enhances holographic imaging accuracy. This method avoids phase-shifting steps and reduces noise for high-quality results in demanding applications.

Keywords:

holography metasurfaces polarization entanglement quantum imaging

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Last Updated: May 5, 2026

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Published on: September 25, 2020

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Uncovering Hidden Dynamics of Natural Photonic Structures Using Holographic Imaging

Uncovering Hidden Dynamics of Natural Photonic Structures Using Holographic Imaging

Published on: March 31, 2022

Area of Science:

Quantum optics and photonics
Metasurface applications
Advanced imaging techniques

Background:

Holography is crucial for characterizing light fields in microscopy and measurement.
Traditional phase-shifting holography suffers from reduced accuracy due to beam deflection and shot noise.
Limitations in current holographic techniques necessitate novel approaches for high-fidelity imaging.

Purpose of the Study:

To propose a novel quantum nonlocal holography via multichannel metasurfaces (QNHM) for high-quality holographic imaging.
To overcome the accuracy limitations of conventional holography under high noise conditions.
To enable advanced applications in biomedicine, material analysis, and quantum information processing.

Main Methods:

Integration of multiple quantum channels onto a metasurface.
Simultaneous measurement of idler photon polarization in four bases.
Nonlocal modulation of signal photon spatiotemporal fields by idler photon polarization, eliminating phase-shifting.

Main Results:

Successful avoidance of multistep phase-shifting operations.
Significant filtering of shot noise through coincidence measurements.
Demonstrated enhancement in signal-to-noise ratio, image contrast, and overall accuracy.

Conclusions:

Quantum nonlocal holography via multichannel metasurfaces offers a robust solution for high-fidelity holographic imaging.
The proposed method significantly improves accuracy and signal-to-noise ratio, especially in noisy environments.
QNHM presents promising potential for advancements in diverse scientific and technological fields.