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Flexibly and Repeatedly Modulating Lasing Wavelengths in a Single Core-Shell Semiconductor Microrod.

Hua Zong1, Yue Yang1, Chuang Ma2

  • 1State Key Laboratory of Artificial Microstructure and Mesoscopic Physics, School of Physics, Peking University , Beijing 100871, P. R. China.

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|May 30, 2017
PubMed
Summary
This summary is machine-generated.

Researchers developed a novel structure for micro/nanorod lasers, enabling flexible and repeated wavelength modulation on a single gallium nitride (GaN)/indium gallium nitride (InGaN) microrod. This breakthrough allows continuous tuning from 372 to 408 nm without altering the laser

Keywords:
core−shelldecouplinggallium nitridesingle micro/nanorod laserwavelength continuously variable

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Area of Science:

  • Optics and Photonics
  • Materials Science
  • Semiconductor Physics

Background:

  • Flexible wavelength modulation is crucial for micro/nanorod laser applications.
  • Existing methods often require physical modification of the laser structure.

Purpose of the Study:

  • To propose and demonstrate a novel structure for micro/nanorod lasers that decouples the gain medium and optical cavity.
  • To achieve continuous and repeatable lasing wavelength modulation on a single microrod.

Main Methods:

  • Design of a core-shell microrod structure separating gain medium and optical cavity.
  • Utilizing gallium nitride (GaN)/indium gallium nitride (InGaN) materials for the microrod.
  • Demonstration of wavelength tuning without altering cavity geometry or cutting the microrod.

Main Results:

  • Achieved continuous and repeatable lasing wavelength modulation from 372 to 408 nm.
  • Demonstrated tunability on a single, facilely synthesized 10 μm microrod.
  • The proposed structure effectively decouples gain and cavity properties.

Conclusions:

  • The developed structure offers a new pathway for flexible wavelength control in micro/nanorod lasers.
  • This method has significant potential for applications in optical telecommunication and environmental monitoring.
  • The ability to tune wavelength without physical modification simplifies device design and operation.