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Updated: Jun 17, 2026

Observation and Analysis of Blinking Surface-enhanced Raman Scattering
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Blue-light-emitting ZnSe random laser.

Toru Takahashi1, Toshihiro Nakamura, Sadao Adachi

  • 1Graduate School of Engineering, Gunma University, Kiryu-shi, Gunma 376-8515, Japan.

Optics Letters
|December 18, 2009
PubMed
Summary

Researchers achieved blue-light random laser action in zinc selenide (ZnSe) particles. This study demonstrates coherent feedback enabling narrow linewidth lasing emissions, paving the way for new photonic devices.

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Area of Science:

  • Materials Science
  • Optics and Photonics
  • Condensed Matter Physics

Background:

  • Random lasers offer unique light emission properties.
  • Coherent feedback mechanisms are crucial for enhancing laser performance.
  • Zinc Selenide (ZnSe) is a semiconductor material with potential for optoelectronic applications.

Purpose of the Study:

  • To investigate blue-light-emitting random laser action in ZnSe particles.
  • To explore the effects of coherent feedback on laser emission characteristics.
  • To analyze the spectral properties and linewidth of the observed lasing.

Main Methods:

  • Utilizing ZnSe particles as the gain medium.
  • Implementing a coherent feedback system.
  • Analyzing emission spectra below and above the lasing threshold using spectroscopy.

Main Results:

  • Observed blue-light random laser action peaking around 475 nm.
  • Identified discrete lasing lines with linewidths < 0.4 nm, significantly narrower than spontaneous emission.
  • Lasing intensity showed pulse-to-pulse variation, but peak wavelengths remained stable.
  • Lasing emission was confirmed to be omnidirectional.

Conclusions:

  • Coherent feedback enables efficient random laser action in ZnSe particles.
  • The observed narrow linewidths indicate high-quality lasing emission.
  • ZnSe particles are promising for developing blue-light random lasers with tunable properties.

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