Low-Threshold Whispering-Gallery Mode Upconversion Lasing via Simultaneous Six-Photon Absorption

Anqi Chen, Hai Zhu, Yanyan Wu, Decheng Yang, Jinyu Li, Siufung Yu, Zhiyang Chen, Yuhao Ren, Xuchun Gui, Shuangpeng Wang, Zikang Tang

Research output: Journal article publicationJournal articleAcademic researchpeer-review

13 Citations (Scopus)


The upconversion lasing through simultaneous multiphoton absorption (MPA) is a high-order nonlinear optical process, which enables many critical applications in the fluorescence imaging probe, laser tomography, and photodynamic therapy. Herein, the upconversion lasing from microwires via simultaneous six-photon absorption at room temperature is first realized. Moreover, the lasing peak and third-harmonic generation peak of pumping light are observed concurrently, while the temperature-dependent spectrum elucidates the essential distinction between each other. In addition, the low-threshold six-photon excited whispering-gallery mode lasing based on strong optical confinement of the hexagonal microcavity is investigated comprehensively. The results prove that it is feasible to realize high-order MPA upconversion lasing using high Q-factor microcavity, which can be promoted to other wide bandgap semiconductor micro-/nanostructure to generate frequency upconversion lasing.

Original languageEnglish
Article number1800407
JournalAdvanced Optical Materials
Issue number17
Publication statusPublished - 4 Sept 2018


  • lasing
  • microcavities
  • multiphoton absorption
  • upconversion

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics


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