Excitation-wavelength-dependent THz wave modulation via external bias electric field

Feng Shi-Jia¹, Dong Li-Quan¹, Ma Dan-Ni¹, Wu Tong¹, Tan Yong¹, Zhang Liang-Liang^{2, †}, Zhang Cun-Lin², Zhao Yue-Jin^{1, ‡}

(a) Relationships between THz and bias electric field intensities produced by laser pulses with different wavelengths, (b) the relationship between THz enhancement effect and electric field intensity.