Photoconductive, continuous wave THz detectors based on rhodium doped InGaAs with 125 dB peak dynamic range

We present continuous-wave terahertz (cw THz) detectors with record high dynamic range of up to 125 dB at 0.12 THz, for the first time. These outstanding detectors are based on rhodium-doped InGaAs. In addition, the rhodium-doped detectors are compared with iron-doped detectors in terms of their electronic, dynamic and THz properties. Overall, the rhodium-doped devices show superior performance, which allows for a bandwidth of 4.5 THz with a 13 dB higher peak dynamic range than the previous record in a coherent setup.