Polarization-resolved ultrafast all-optical terahertz micro-grating array modulator based on Weyl semimetallic microfilm towards 6G technology

THz active modulation device by electric field turned modulation characteristics of titanium sulfide nanofilm device

“…Notably, the SnS 2 device with a device constant of 700 μm exhibits a more pronounced modulation effect. When an external electric field is applied to the surface of a sample, two distinct mechanisms occur: increased charge carrier surface transport and generated strain or stress resulting from the electromechanical effect in 2D materials 23 . Polar plots of transmitted THz electric field change as a function of the polarization angle are shown in Appendix.…”

“…$$MD=\left|\frac{{I}_{\text{active}}^{T}-{I}_{\text{passive}}^{T}}{{I}_{\mathrm{passive}}^{T}}\right|$$, 23 where $${I}_{\text{active}}^{T}$$ and $${I}_{\text{passive}}^{T}$$ are the transmitted THz electric field intensities in the active and passive cases, respectively. The polar plots of the transmitted THz intensities as a function of applied voltage for three electrode directions ( X , Y , Z ) and device constants of 500, 600, and 700 μm.…”