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”Mirrorless” UV lasers in ZnO polycrystalline films and powder

  • H. Cao (a1), Y. G. Zhao (a1), H. C. Ong (a1), J. Y. Dai (a2), X. Liu (a2), E. W. Seelig (a2) and R. P. H. Chang (a2)...


We report the first observation of ultraviolet lasing in ZnO powder and ZnO polycrystalline films grown on amorphous fused silica substrates. In the absence of any fabricated mirrors, laser action occurs in the closed loops formed by multiple optical scattering of light.



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1. Zhang, Z.-Q., Phys. Rev. B 52, 7960 (1995).
2. Wiersma, D. S. and Lagendijk, A., Phys. Rev. E 54, 4256 (1996).


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