Two-color laser wavelength effect on intense terahertz generation in air

Li Shufen^{1, 2}, Lu Chenhui^3,, Yang Chengshuai², Yu Yanzhong¹, Sun Zhenrong², Zhang Shian^{2, 4,}

(color online) The THz amplitude as a function of the laser wavelength for the given laser intensity of and pulse duration of τ = 50 fs. The THz amplitude increases with the increase of the laser wavelength, which shows a linear relationship.