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Updated: Feb 14, 2026

Characterization of Surface Modifications by White Light Interferometry: Applications in Ion Sputtering, Laser Ablation, and Tribology Experiments

Characterization of Surface Modifications by White Light Interferometry: Applications in Ion Sputtering, Laser Ablation, and Tribology Experiments

Published on: February 27, 2013

A White Random Laser.

Shu-Wei Chang¹, Wei-Cheng Liao¹, Yu-Ming Liao¹

¹Department of Physics, National Taiwan University, Taipei, 10617, Taiwan.

Scientific Reports

|February 11, 2018

Summary

This summary is machine-generated.

Researchers developed a stable white random laser (White-RL) using simple, cost-effective methods. This novel laser offers isotropic emission and tunable colors, ideal for diverse applications.

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Area of Science:

Optics and Photonics
Materials Science

Background:

Random lasers offer advantages like simple fabrication and angle-free emission, making them suitable for various applications.
Achieving high purity, stability, and isotropic emission characteristics in random lasers remains a challenge.

Purpose of the Study:

To design and fabricate a white random laser (White-RL) with high purity and stability.
To demonstrate the feasibility of dynamically tuning the color output of the White-RL over a broad visible spectrum.

Main Methods:

Utilized cost-effective organic laser dyes and an all-solution process for fabrication.
Employed self-assembled structures to achieve the desired laser properties.
Integrated three monochromatic laser films with selective pumping for color tuning.

Main Results:

Successfully demonstrated a high-purity and high-stability White-RL.
Observed nearly isotropic wavelength, linewidth, and intensity, which are difficult to achieve in conventional lasers.
Showcased dynamic color tuning across the visible spectrum through on-chip integration.

Conclusions:

The developed White-RL exhibits unique isotropic emission properties and tunable color output.
The cost-effective materials and simple fabrication methods highlight the practical potential of this technology.
White-RLs show significant promise for applications in illumination, imaging, displays, communication, and biosensing.