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Wrinkled 2D Materials: A Versatile Platform for Low-Threshold Stretchable Random Lasers.

Han-Wen Hu1, Golam Haider1, Yu-Ming Liao1

  • 1Department of Physics, National Taiwan University, Taipei, 106, Taiwan.

Advanced Materials (Deerfield Beach, Fla.)
|October 10, 2017
PubMed
Summary
This summary is machine-generated.

Researchers developed wearable random lasers using wrinkled 2D materials. These flexible devices achieve ultralow lasing thresholds, paving the way for advanced optoelectronics and visible-spectrum communication technologies.

Keywords:
2D materialsrandom lasersstretchable materialswide spectrumwrinkled structures

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Area of Science:

  • Materials Science
  • Optoelectronics
  • Nanotechnology

Background:

  • Developing stretchable and flexible random laser systems is crucial for next-generation technologies like visible-spectrum communication and solid-state lighting.
  • The rigidity of traditional resonators limits their application in wide spectral range laser generation.
  • Wrinkled 2D materials offer superior stretchability and photon-trapping capabilities compared to flat materials.

Purpose of the Study:

  • To design highly stretchable and wearable random laser devices with ultralow thresholds.
  • To explore the potential of wrinkled 2D materials in creating advanced optoelectronic devices.
  • To demonstrate tunable lasing wavelengths in wearable laser systems.

Main Methods:

  • Utilizing wrinkled reduced graphene oxide, single-layer graphene, and few-layer hexagonal boron nitride as matrices.
  • Employing methyl-ammonium lead bromide perovskite nanocrystals (PNC) as the active material.
  • Investigating the lasing threshold and tunability using different active materials like semiconductor quantum dots.

Main Results:

  • Achieved a lasing threshold of approximately 10 µJ cm⁻², significantly lower than previously reported values.
  • Demonstrated the capability to tune the output lasing wavelength by changing the active materials.
  • Successfully designed and fabricated highly stretchable and wearable random laser devices.

Conclusions:

  • Wrinkled 2D materials are effective for creating high-performance, stretchable random lasers.
  • The developed random laser system exhibits ultralow thresholds and tunable wavelengths, suitable for wearable optoelectronics.
  • This research offers a promising pathway for the advancement of flexible and wearable optoelectronic devices.