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Abstract <p>The luminescent and lasing properties of&#xa0;ZnO microtubes synthesized by a modified thermal evaporation method have been studied by photoluminescence spectroscopy. It is shown that whispering gallery modes are responsible for lasing in the near-UV range. The possibility of achieving low lasing thresholds (down to ~8 kW/cm<sup>2</sup>) and high optical quality factors (above 3900) is demonstrated. A mechanism for forming such microcrystals is proposed, which is based on the assumption of simultaneous growth and etching along the [0001] crystallographic direction.</p>

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ZnO Microtubes: Formation Mechanism and Whispering Gallery Mode Lasing

  • 期刊论文

  • 发表日期：

    2025年2月1日

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  • A. P. Tarasov,
  • L. A. Zadorozhnaya,
  • B. V. Nabatov,
  • V. M. Kanevsky

摘要

Abstract

The luminescent and lasing properties of ZnO microtubes synthesized by a modified thermal evaporation method have been studied by photoluminescence spectroscopy. It is shown that whispering gallery modes are responsible for lasing in the near-UV range. The possibility of achieving low lasing thresholds (down to ~8 kW/cm2) and high optical quality factors (above 3900) is demonstrated. A mechanism for forming such microcrystals is proposed, which is based on the assumption of simultaneous growth and etching along the [0001] crystallographic direction.