Answers are grounded in this paper and cite their sources.
A two-photon detector based on intersubband transitions in GaAs/AlGaAs quantum wells operating in the Terahertz regime below the Reststrahlenband is reported. Resonantly enhanced optical nonlinearities enables sensitive quadratic detection at pJ pulse energies. We demonstrate its use in a quadratic autocorrelator for far-infrared picosecond pulses at around 7 THz.
No takes yet. Share an insight, caveat, or question.
Schneider et al. (2009) studied this question.
Synapse has enriched 10 related papers. Consider them for comparative context: