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Related Experiment Video

Updated: May 29, 2025

Direct Imaging of Laser-driven Ultrafast Molecular Rotation
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Continuous-Wave Pumped Self-Assembled Colloidal Topological Lasers.

Rui Duan1, Qiang Zhang2, Yi Tian Thung3,4

  • 1Institute of Applied Physics and Materials Engineering, University of Macau, Macao SAR, 999078, China.

Advanced Materials (Deerfield Beach, Fla.)
|February 7, 2025
PubMed
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This study introduces a novel colloidal topological laser for optoelectronic integrated circuits, achieving efficient continuous-wave pumping at room temperature. The breakthrough enables stable, tunable, and highly polarized laser output from solution-processed systems.

Area of Science:

  • Optoelectronics
  • Materials Science
  • Nanotechnology

Background:

  • Developing efficient room-temperature continuous-wave (CW) lasers is crucial for optoelectronic integrated circuits.
  • Colloidal semiconductor lasers offer economical manufacturing but face challenges in gain materials and cavity structures, often requiring pulsed laser pumping.
  • Existing colloidal lasers struggle with stability and efficiency under continuous pumping conditions.

Purpose of the Study:

  • To propose and demonstrate a self-assembled colloidal topological laser capable of room-temperature continuous-wave (CW) pumping.
  • To overcome limitations in gain materials and cavity structures for colloidal semiconductor lasers.
  • To achieve controlled polarization and enhanced performance in solution-processed optoelectronic devices.

Main Methods:

Keywords:
colloidal nanoplateletscontinuous‐wave pumpingself‐assembled topological laserwavelength tunability

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  • Utilizing an interfacial self-assembly strategy to control the orientation of colloidal nanoplatelets (NPLs).
  • Precisely controlling the thickness of single NPL layers.
  • Investigating amplified spontaneous emission polarization and laser performance under CW pumping.

Main Results:

  • Achieved controlled collective orientation of NPLs (face-down or edge-up) for the first time.
  • Demonstrated extensive wavelength tunability exceeding 50 nm.
  • Obtained ultra-high polarization (over 95%) and good temporal stability.
  • Successfully operated a colloidal topological laser with CW pumping at room temperature.

Conclusions:

  • The proposed colloidal topological laser represents a significant advancement in CW-pumped colloidal semiconductor lasers.
  • The interfacial self-assembly strategy offers precise control over NPLs, leading to optimal laser performance.
  • This work paves the way for a new era of solution-processed optoelectronic integrated circuits with enhanced laser capabilities.