THz Detection Electronics and Time Delay Controllers

The general setup used to detect the radiation from our THz receiver chip is shown in the diagram below:

• We have a wide variety of low noise current amplifiers from both Ithaco (model 1211) and Stanford Research Systems (model SR570)

• Lock-in Amplifiers from Stanford Research Systems (model SR530andmodel SR830).

• In addition we use DC power supplies to provide a bias voltage for our THz source chips.

• We use computer controlled delay lines with interferometric (0.1 m) precision to provide the delay of the optical pulses used to gate the THz experiment. These are from the Newport/Klinger Company.