Fig. 1. Variation of terahertz energy generated from two-color laser field with laser wavelength

Fig. 2. Comparison of the intensity of terahertz generation under different laser fields

Fig. 3. Variation of terahertz energy generated from two-color laser field with relative phase

Fig. 4. Transient current distribution of two-color filament with different relative phases

Fig. 5. Variation of terahertz energy generated from two-color laser field with laser pulse width