Title :

Phase-Coherent Heterodyne Detection in the Terahertz Regime With a Photomixer

Author(s) :

Constantin, Florin Lucian [Auteur]
Laboratoire de Physique des Lasers, Atomes et Molécules - UMR 8523 [PhLAM]

Journal title :

IEEE Journal of Quantum Electronics

Pages :

1458-1462

Publisher :

Institute of Electrical and Electronics Engineers

Publication date :

2011

ISSN :

0018-9197

English keyword(s) :

Submillimeter-wave measurements
photomixer
rectification
heterodyne detection

HAL domain(s) :

Physique [physics]/Physique [physics]/Optique [physics.optics]
Physique [physics]/Physique [physics]/Instrumentations et Détecteurs [physics.ins-det]
Sciences de l'ingénieur [physics]/Electromagnétisme

English abstract : [en]

A low-temperature-grown GaAs photomixer with a spiral antenna has a quadratic response to the optical fields and an intrinsic nonlinear IV characteristic that allow the detection of THz radiation. A transmission line coupled ...
Show more >A low-temperature-grown GaAs photomixer with a spiral antenna has a quadratic response to the optical fields and an intrinsic nonlinear IV characteristic that allow the detection of THz radiation. A transmission line coupled to the antenna provides the photomixer with direct-current access in the microwave domain. The non-ohmic response of the photomixer is probed by rectification. The optical beat between two continuous-wave lasers illuminating the photomixer serves as a local oscillator with an adjustable difference-frequency in the THz domain. The beat between a THz field modulated at a radiofrequency rate with a radiofrequency-modulated optical beat is exploited in a phase-sensitive detection scheme.Show less >

Language :

Anglais

Popular science :

Non

Collections :

• Laboratoire de Physique des Lasers, Atomes et Molécules (PhLAM) - UMR 8523

Source :

Harvested from HAL