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Droplet Lasers for Smart Photonic Labels.

A Capocefalo1, E Quintiero2, C Conti1

  • 1CNR ISC, Istituto dei Sistemi Complessi, c/o Università Sapienza, Piazzale Aldo Moro 5, 00185 Roma, Italy.

ACS Applied Materials & Interfaces
|October 20, 2021
PubMed
Summary
This summary is machine-generated.

Researchers developed tunable liquid microlasers using self-forming droplets. These smart photonic labels offer reusable, adaptable anti-counterfeiting and multiplexed bioassay solutions.

Keywords:
anticounterfeitingmicrolasersphotonic labelsrandom lasersself-formationsoft lithographyviscoelastic dewettingwhispering-gallery mode

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Area of Science:

  • Photonics and Materials Science
  • Microscale light-matter interactions
  • Development of advanced photonic devices

Background:

  • Microscopic lasers enhance light-matter interactions at the microscale.
  • Tunable emission is crucial for advanced photonic applications.
  • Self-assembly methods offer novel fabrication routes.

Purpose of the Study:

  • To realize liquid microlasers with tunable emission.
  • To develop flexible, reusable smart photonic labels.
  • To explore novel lasing mechanisms for spectroscopic encoding.

Main Methods:

  • Exploiting viscoelastic dewetting for self-formation of 3D liquid droplets in a polymer matrix.
  • Designing a flexible device for detachable and reusable photonic labels.
  • Implementing whispering gallery mode emission coupled with random lasing.

Main Results:

  • Achieved tunable emission from liquid microlasers.
  • Demonstrated the fabrication of flexible, reusable photonic labels on various substrates (paper, fabric).
  • Showcased a lasing mechanism combining whispering gallery modes and random lasing via dielectric inclusions.

Conclusions:

  • Liquid microlasers with tunable emission were successfully realized.
  • The developed photonic labels are flexible, reusable, and suitable for diverse applications.
  • The tunable emission enables spectroscopic encoding for photonic barcodes, anti-counterfeiting, and multiplexed bioassays.