Submm/THz photomixers

 Sub-mm results from lumped-element UTCs of own design and production at University of Sheffield, using 2”-InGaAs-UTC-structured InP-wafers from SWI 
Left: One of the micro-fabricated UTC-photodiodes of 5mu diameter, integrated into a bow-tie antenna.

Right: Output spectrum of 5 mu diameter photodiode, tested for submm-generation, 200mW dual laser pump power. The cut-off frequency is 200 GHz, this is ultra-fast.