We report the relationship between the divergence angle of the terahertz radiation generated in air and the convergence conditions of the optical beam. We find that tighter focusing produces wider divergence angles, but higher power.
© 2006 Optical Society of America
(190.0190) Nonlinear optics : Nonlinear optics
(190.4380) Nonlinear optics : Nonlinear optics, four-wave mixing
(320.0320) Ultrafast optics : Ultrafast optics
(320.7120) Ultrafast optics : Ultrafast phenomena
H. Zhong, N. Karpowicz, and X. Zhang, "Radiation Profile of THz Generation in Air with Different Convergence Conditions," in Conference on Lasers and Electro-Optics/Quantum Electronics and Laser Science Conference and Photonic Applications Systems Technologies, Technical Digest (CD) (Optical Society of America, 2006), paper JTuD21.
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