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Related Experiment Video

Updated: Jan 30, 2026

Quantum State Engineering of Light with Continuous-wave Optical Parametric Oscillators

Quantum State Engineering of Light with Continuous-wave Optical Parametric Oscillators

Published on: May 30, 2014

Quantum reference beacon-guided superresolution optical focusing in complex media.

Donggyu Kim^1,2, Dirk R Englund^2,3

¹Department of Mechanical Engineering, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, MA 02139, USA. donggyu@mit.edu.

Science (New York, N.Y.)

|February 2, 2019

Summary

This summary is machine-generated.

Researchers developed a quantum reference beacon (QRB) to guide wavefront shaping for superresolution optical focusing. This technique overcomes scattering in complex media, achieving sub-186 nm resolution for advanced microscopy and quantum applications.

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Last Updated: Jan 30, 2026

Quantum State Engineering of Light with Continuous-wave Optical Parametric Oscillators

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Area of Science:

Optics and Photonics
Quantum Technology
Materials Science

Background:

Optical scattering in microscopy limits imaging depth and resolution.
Wavefront shaping improves deep imaging but struggles with superresolution in scattering media.

Purpose of the Study:

To develop a method for achieving superresolution optical focusing within complex, scattering media.
To utilize quantum phenomena for enhanced feedback in wavefront shaping.

Main Methods:

Implemented a quantum reference beacon (QRB) using solid-state quantum emitters (nitrogen-vacancy centers in diamond nanocrystals).
Employed spin-dependent fluorescence of the QRB as a subwavelength guidestar for wavefront shaping.
Achieved guided wavefront shaping for precise optical focusing.

Main Results:

Demonstrated superresolution optical focusing with a resolution below 186 nanometers.
Successfully overcame limitations imposed by optical scattering in complex media.
QRB-guided wavefront shaping enabled sub-diffraction-limited focusing.

Conclusions:

QRB-assisted wavefront shaping is a viable technique for achieving superresolution in scattering environments.
This method has potential applications in deep-tissue quantum-enhanced sensing.
It can also be used for precise optical excitation in quantum information processing.