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THz coplanar waveguides were fabricated on quartz wafers with integrated epitaxially transferred low temperature grown gallium arsenide photoconductive switches. THz radiation was excited on-chip and transmitted through a tapering of the coplanar waveguide structure where it was focused down to ∼ 1.66μm. Theoretical modelling of the device confirms high E-field confinement and concentration.
We present a new measurement technique for the sub-Kelvin excitation and detection of on-chip terahertz frequency radiation in high magnetic fields. We present a monolithically integrated heterostructure, which allows a mesoscopic electronic system to be combined with an on-chip terahertz device, and show dynamic imaging of a THz photoconductive switch at 200 mK in a 12 T field, together with THz...
A terahertz quantum cascade laser and an integrated Auston-switch are coupled to perform ultrafast gain switching. The resulting non-equilibrium gain is not clamped above laser threshold and large amplification of input terahertz pulses is demonstrated.
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