Title :

Multifrequency terahertz-wave emission and detection with the photomixing approach: theory and experiments

Author(s) :

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

Scientific editor(s) :

Mona Jarrahi
Sascha Preu
Dmitry Turchinovich

Conference title :

Terahertz Photonics

City :

Strasbourg

Country :

France

Start date of the conference :

2020-04-06

Book title :

SPIE Conference Proceedings

Journal title :

Terahertz Photonics

Publisher :

SPIE

English keyword(s) :

low-temperature-grown GaAs photomixer
optical frequency down-conversion
THz frequency comb
THzwave modulation
THz-wave direct detection
THz-wave 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]/Micro et nanotechnologies/Microélectronique

English abstract : [en]

This contribution addresses theoretically and experimentally the photomixing signal in a low-temperature-grown GaAs (LTG-GaAs) device with a planar antenna that is driven with an alternative electric field superposed on a ...
Show more >This contribution addresses theoretically and experimentally the photomixing signal in a low-temperature-grown GaAs (LTG-GaAs) device with a planar antenna that is driven with an alternative electric field superposed on a bias electric field. The total electric field is applied on the optically-driven nonlinear photoconductance of LTG-GaAs. A theoretical framework based on unidimensional carrier transport is developed to calculate the amplitudes and the phases of different spectral components of the current density. Radiofrequency modulation of the photomixing signal in the microwave domain is experimentally demonstrated. Conversely, the photomixer is exploited as an optically-driven detector. Heterodyne detection with a photomixer is experimentally demonstrated with modulated THz-waves. The photomixing approach allows to extract THz modulation parameters by measurements with a modulated optical beat.Show less >

Language :

Anglais

Peer reviewed article :

Oui

Audience :

Internationale

Popular science :

Non

Collections :

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

Source :

Harvested from HAL