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Confining energy migration in upconversion nanoparticles towards deep ultraviolet lasing

Author

Listed:
  • Xian Chen

    (City University of Hong Kong)

  • Limin Jin

    (The Hong Kong Polytechnic University)

  • Wei Kong

    (City University of Hong Kong)

  • Tianying Sun

    (City University of Hong Kong)

  • Wenfei Zhang

    (The Hong Kong Polytechnic University)

  • Xinhong Liu

    (City University of Hong Kong)

  • Jun Fan

    (City University of Hong Kong
    City University of Hong Kong Shenzhen Research Institute)

  • Siu Fung Yu

    (The Hong Kong Polytechnic University)

  • Feng Wang

    (City University of Hong Kong
    City University of Hong Kong Shenzhen Research Institute)

Abstract

Manipulating particle size is a powerful means of creating unprecedented optical properties in metals and semiconductors. Here we report an insulator system composed of NaYbF4:Tm in which size effect can be harnessed to enhance multiphoton upconversion. Our mechanistic investigations suggest that the phenomenon stems from spatial confinement of energy migration in nanosized structures. We show that confining energy migration constitutes a general and versatile strategy to manipulating multiphoton upconversion, demonstrating an efficient five-photon upconversion emission of Tm3+ in a stoichiometric Yb lattice without suffering from concentration quenching. The high emission intensity is unambiguously substantiated by realizing room-temperature lasing emission at around 311 nm after 980-nm pumping, recording an optical gain two orders of magnitude larger than that of a conventional Yb/Tm-based system operating at 650 nm. Our findings thus highlight the viability of realizing diode-pumped lasing in deep ultraviolet regime for various practical applications.

Suggested Citation

  • Xian Chen & Limin Jin & Wei Kong & Tianying Sun & Wenfei Zhang & Xinhong Liu & Jun Fan & Siu Fung Yu & Feng Wang, 2016. "Confining energy migration in upconversion nanoparticles towards deep ultraviolet lasing," Nature Communications, Nature, vol. 7(1), pages 1-6, April.
    • Handle: RePEc:nat:natcom:v:7:y:2016:i:1:d:10.1038_ncomms10304
    DOI: 10.1038/ncomms10304
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