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Updated: Jul 15, 2025

Fabrication of Polymer Microspheres for Optical Resonator and Laser Applications
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Integrating Fluorescent Nanodiamonds into Polymeric Microstructures Fabricated by Two-Photon Polymerization.

Filipe A Couto1, Marcelo B Andrade1, Adriano J G Otuka1

  • 1São Carlos Institute of Physics, University of São Paulo, P.O. Box 369, São Carlos 13560-970, SP, Brazil.

Nanomaterials (Basel, Switzerland)
|September 28, 2023
PubMed
Summary

Researchers developed a method to embed fluorescent nanodiamonds with nitrogen-vacancy (NV) centers into microstructures using two-photon polymerization (2PP). This technique enables the integration of quantum emitters into photonic devices for advanced quantum technologies.

Keywords:
nanodiamondsquantum emitterstwo-photon polymerization

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Area of Science:

  • Quantum optics and photonics
  • Materials science and engineering
  • Nanotechnology

Background:

  • Nitrogen-vacancy (NV) centers in diamond are valuable non-photobleaching quantum emitters and sensors.
  • Fabricating microstructures in bulk diamond is challenging, necessitating alternative integration methods.
  • Embedding nanodiamonds with color centers offers a pathway to integrate quantum emitters into photonic devices.

Purpose of the Study:

  • To demonstrate a method for incorporating fluorescent nanodiamonds into engineered microstructures.
  • To optimize nanodiamond concentration in photoresist for desired structural and optical properties.
  • To enable the fabrication of microstructures for photonics and quantum technology applications.

Main Methods:

  • Utilized two-photon polymerization (2PP) for microfabrication.
  • Incorporated fluorescent nanodiamonds into photoresist formulations.
  • Employed fluorescence, Raman spectroscopy, and absorbance measurements for characterization.

Main Results:

  • Successfully fabricated microstructures embedded with fluorescent nanodiamonds.
  • Identified optimal nanodiamond concentrations for achieving fluorescent NV centers and good structural quality.
  • Quantified scattering losses at higher nanodiamond concentrations using absorbance measurements.

Conclusions:

  • The developed 2PP method is feasible for embedding nanodiamonds into microstructures.
  • This technique facilitates the integration of quantum emitters for photonics and quantum technologies.
  • The study provides a viable route for creating advanced quantum devices.