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Updated: Jul 11, 2025

Implementation of a Reference Interferometer for Nanodetection

Implementation of a Reference Interferometer for Nanodetection

Published on: April 26, 2014

Multicone Diamond Waveguides for Nanoscale Quantum Sensing.

Tianqi Zhu¹, Jan Rhensius², Konstantin Herb¹

¹Department of Physics, ETH Zürich, Otto-Stern-Weg 1, 8093 Zürich, Switzerland.

|November 7, 2023

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Minimizing Sensor-Sample Distances in Scanning Nitrogen-Vacancy Magnetometry.

ACS nano·2025

Researchers improved quantum sensing by coupling nitrogen-vacancy (NV) centers to diamond nanopillars. This enhances fluorescence collection efficiency, boosting signal-to-noise ratio for magnetic and electric field detection.

Area of Science:

Quantum sensing
Materials science
Nanotechnology

Background:

Nitrogen-vacancy (NV) centers in diamond are promising quantum sensors.
Low signal-to-noise ratio (SNR) limits sensitivity in optical spin-readout techniques.
Improving fluorescence collection efficiency is key to enhancing NV center sensor performance.

Purpose of the Study:

To enhance the sensitivity of NV center quantum sensors.
To overcome the limitations of current optical spin-readout techniques.
To improve fluorescence collection efficiency using optimized diamond nanostructures.

Main Methods:

Coupling individual NV centers to optimized diamond nanopillars.
Utilizing near-field optical simulations to guide device design.

Keywords:

diamond nanofabrication diamond nanophotonics multicone nanopillar nitrogen-vacancy center quantum sensing

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Last Updated: Jul 11, 2025

Implementation of a Reference Interferometer for Nanodetection

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Resonance Raman Spectroscopy of Extreme Nanowires and Other 1D Systems

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Fabricating and characterizing diamond nanopillar structures using advanced nanofabrication.

Analyzing fluorescence collection efficiency and SNR improvements.

Main Results:

Optimized tall (≥5 μm) diamond nanopillars with tapered sidewalls were predicted to enhance performance.
Fabricated devices demonstrated increased SNR compared to standard configurations.
Improved emission collimation and directionality were observed.
Enhanced devices are compatible with low-numerical-aperture optics and reduced tip radii.

Conclusions:

Coupling NV centers to optimized diamond nanopillars significantly improves quantum sensor SNR.
The developed nanofabrication process enables the creation of high-performance NV-based sensors.
These enhanced sensors offer potential for improved spatial resolution and reduced experimental complexity in scanning applications.