Time-Domain Modelling of Pulsed Photoconducting Sources—Part I: The Norton Equivalent Circuit

In the circuit theory, Norton and Thevenin equivalent generators are tools that simplify solutions of networks involving passive or active components. They have been extensively used in frequency domain to describe time-harmonic sources. A time-stepped evolution is instead typically include transient As a particular case latter, extended here investigate pulsed photoconducting sources, where dc bias voltage optical laser combined generate terahertz (THz) bursts. The proposed derivation relies on application electromagnetic (EM) equivalence theorem. main conclusion this understanding that, from three different spectral regions (dc, THz, optics), only THz radiation be explicitly included circuit. theory validated by campaign measurements reported connected paper.