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Guang Dai1, Yan Liu2, Zhenzhen Shang3

  • 1Tianjin Key Laboratory of Quantum Optics and Intelligent Photonics, School of Science, Tianjin University of Technology, Tianjin 300384, China.

Nanomaterials (Basel, Switzerland)
|November 12, 2025
PubMed
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This summary is machine-generated.

A novel flexible random laser sensor demonstrates high sensitivity for displacement detection. Micro-displacements alter the laser

Area of Science:

  • Photonics
  • Materials Science
  • Sensor Technology

Background:

  • Flexible random lasers offer unique optical properties for sensing applications.
  • Developing sensitive displacement sensors is crucial for various scientific and industrial fields.

Purpose of the Study:

  • To propose and demonstrate a highly sensitive displacement sensor utilizing a flexible random laser.
  • To investigate the relationship between micro-displacement and random laser output intensity.

Main Methods:

  • Fabrication of a flexible grating random laser using polydimethylsiloxane (PDMS) film with a self-assembled surface grating.
  • Utilizing oxygen plasma treatment and bending prestress to create photon-trapping microcavities.
  • Characterizing random lasing emission and its response to applied micro-displacements.
Keywords:
PDMSflexiblerandom lasersensor

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Main Results:

  • The flexible grating random laser exhibited lasing emission with a linewidth of ~0.25 nm and a degree of polarization of ~0.82.
  • A linear correlation (R² ≈ 0.91) was observed between applied micro-displacement and the random laser output intensity.
  • The sensor demonstrated high sensitivity to changes in grating morphology induced by displacement.

Conclusions:

  • The proposed flexible grating random laser sensor effectively detects micro-displacements with high sensitivity.
  • This technology provides a low-cost fabrication method for flexible random lasers.
  • The findings open avenues for novel high-sensitivity mechanical sensors and integrated photonic devices.