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Microwave Photonics Systems Based on Whispering-gallery-mode Resonators
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Chicken albumen-based whispering gallery mode microlasers.

Hanh Hong Mai1, Tam Trong Nguyen2, Khoi Manh Giang3

  • 1Department of Quantum Optics, Faculty of Physics, University of Science, Vietnam National University, 334 Nguyen Trai, Hanoi 100000, Vietnam. hanhhongmai@hus.edu.vn and Key Laboratory for Multi-scale Simulations of Complex Systems, Vietnam National University, Hanoi, 334 Nguyen Trai, Hanoi 100000, Vietnam.

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Chicken albumen microspheres function as effective biolasers. These novel biomaterial lasers show potential for applications in biosensing and medical treatments.

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Area of Science:

  • Biophotonics
  • Materials Science
  • Biomedical Engineering

Background:

  • Biomaterial-based microlasers are gaining interest for medical treatments, bio-tracking, and biosensing.
  • Developing low-cost, biocompatible laser cavities is crucial for advancing these applications.

Purpose of the Study:

  • To demonstrate chicken albumen as a novel biomaterial for fabricating microlasers.
  • To investigate the lasing properties and potential applications of these albumen-based microsphere lasers.

Main Methods:

  • Fabrication of rhodamine B-doped chicken albumen microspheres (20-100 μm diameter) using an emulsion process.
  • Optical pulse excitation to induce and analyze lasing emission.
  • Investigation of whispering gallery mode (WGM) as the lasing mechanism.

Main Results:

  • Successful fabrication of chicken albumen microspheres exhibiting lasing emission.
  • Achieved a low threshold of 23.2 μJ mm⁻² and a high Q-factor of ~2400 for an 82 μm microsphere.
  • Observed size-dependent lasing characteristics consistent with WGM theory.
  • Demonstrated operation in aqueous and biological environments (water, human blood serum).

Conclusions:

  • Chicken albumen is a viable, low-cost biomaterial for creating functional microlasers.
  • The microsphere biolasers exhibit promising performance metrics and biocompatibility.
  • Potential applications in laser-based biosensing and biological imaging are highlighted.