Electrically-driven heterodyne detection of a multifrequency THz-wave with a photomixer

Florin Lucian Constantin (1)

1 PhLAM - Laboratoire de Physique des Lasers, Atomes et Molécules - UMR 8523

The spectral components of a multifrequency THz-wave may be characterized using the nonlinear electrical response of a low temperature grown GaAs photomixer. The heterodyne detection with the photomixer is exploited to down-convert a radiofrequency-modulated THz-wave to the microwave domain, by using a suitably tuned optical beat that acts as local oscillator. The photomixer is electrically driven with an alternative voltage oscillating at the modulation frequency and provides a phase-sensitive DC response signal indicating the demodulation of the THz-wave.

Mots clés: frequency conversion; heterodyne detection; demodulation; low-temperature-grown GaAs; photomixer

Domaines: Optique [physics.optics]; Electromagnétisme; Instrumentations et Détecteurs [physics.ins-det]; Micro et nanotechnologies/Microélectronique

Florin Lucian Constantin. Electrically-driven heterodyne detection of a multifrequency THz-wave with a photomixer. SPIE OPTO, Mar 2021, San Francisco, United States. pp.2591979, ⟨10.1117/12.2591979⟩. ⟨hal-03335661⟩