Application of liftoff low‐temperature‐grown GaAs on transparent substrates for THz signal generation

Epitaxial liftoff (ELO) of low‐temperature‐grown GaAs (LT‐GaAs) is employed to fabricate (sub)picosecond photoconductive switches on optically transparent substrates for THz applications. Glass is selected as a substrate for on‐wafer probes while sapphire is chosen for free‐space antennas.