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Quasi-phase-matched Čerenkov second-harmonic generation in a hexagonally poled LiTaO3 waveguide

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4 Author(s)
Zhang, Y. ; National Laboratory of Solid State Microstructures, Nanjing University, Nanjing 210093, China and Physics Department, Nanjing University, Nanjing 210093, China ; Qi, Z. ; Wang, W. ; Zhu, S.N.

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The authors reported a type of second-harmonic generation in a hexagonally poled LiTaO3 waveguide. The emerged second-harmonic waves exhibited a hexagonal pattern when projected on a screen behind the waveguide. This frequency conversion process was realized by guided-to-radiated mode interaction. Phase matching for this process was automatically achieved by a quasi-phase-matched Čerenkov configuration.

Published in:

Applied Physics Letters  (Volume:89 ,  Issue: 17 )