Chinese Optics Letters, 2013, 11 (12): 123002, Published Online: Dec. 13, 2013
Terahertz emission by balanced nonlinear effects in air plasma Download: 762次
Abstract
The evolution of terahertz (THz) waveform in air plasma driven by low-energy few-cycle laser pulses is investigated to improve the accuracy of the carrier envelope phase (CEP) determination. Based on the transient photocurrent model, a balanced spatial distribution of the Kerr and free-electron effects in the plasma is found at 109 \mu J input energy. THz inversion occurs only once at the initial CEP of 0.5\pi, in which high-precision measurement of the CEP of few-cycle laser pulses is achieved.
Rongjie Xu, Ya Bai, Liwei Song, Na Li, Peng Peng, Peng Liu. Terahertz emission by balanced nonlinear effects in air plasma[J]. Chinese Optics Letters, 2013, 11(12): 123002.