Surface Emitting THz Wave Parametrical Oscillator Using MgO:LiNbO
ZHANG Xian-Bin1, SHI Wei1, T. Ikari2, H. Ito2
1Department of Physics, Xi'an University of Technology, Xi'an 7100482Photo Dynamics Research Center, RIKEN, 519-1399 Aramaki-Aoba, Sendai 980-8577, Japan
Surface Emitting THz Wave Parametrical Oscillator Using MgO:LiNbO
ZHANG Xian-Bin1;SHI Wei1;T. Ikari2;H. Ito2
1Department of Physics, Xi'an University of Technology, Xi'an 7100482Photo Dynamics Research Center, RIKEN, 519-1399 Aramaki-Aoba, Sendai 980-8577, Japan
摘要Room-temperature operation terahertz (THz) wave source is demonstrated using three MgO:LiNbO3 crystals which have a noncollinear arrangement. The experimental results show that the THz wave can be tunable from 0.8THz to 3.0THz, and the peak energy output is 103pJ/pulse at 1.5THz. The noncollinear cavity configuration makes the THz beam have Gaussian-like spatial distribution, small divergence angle, perpendicularly eradiated from the crystal surface. The beam quality factor M2 is measured to be Mx2=1.15, Mz2=1.25 for characterizing the THz wave beam. Experiments also show that the THz beam can be focused by using a polyethylene lens, and the focal spot size is close to the diffraction limit.
Abstract：Room-temperature operation terahertz (THz) wave source is demonstrated using three MgO:LiNbO3 crystals which have a noncollinear arrangement. The experimental results show that the THz wave can be tunable from 0.8THz to 3.0THz, and the peak energy output is 103pJ/pulse at 1.5THz. The noncollinear cavity configuration makes the THz beam have Gaussian-like spatial distribution, small divergence angle, perpendicularly eradiated from the crystal surface. The beam quality factor M2 is measured to be Mx2=1.15, Mz2=1.25 for characterizing the THz wave beam. Experiments also show that the THz beam can be focused by using a polyethylene lens, and the focal spot size is close to the diffraction limit.
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2007, Vol. 24 
