THz source

Optimisation of THz pulse emitted by InGaAs Photoconductive switch (PCS)  with indigenous code MAXTRA 3D solving coupled MAXwell & TRAnsport equations in three dimensions with adaptative mesh.


Parametric study of THz pulse versus :

  • Static polarization (ddp)
  • Nature of the materials (gap in lifetime of carriers short, III-V semi-insulating
  • Substrate (InP or GaAs) substrate dielectric (BCB)
  • Position of the laser spot
  • Electron mobility
  • Topology of the gap
  • Characteristic impedance

Photoconductive switch (PCS) on semi insulated InP inserted in CPW:

Ey electrical field in PCS gap
THz pulse on the edge of PCS gap