Article | REF: E4063 V1

Detectors of terahertz electromagnetic radiations

Author: Jean-Louis COUTAZ

Publication date: August 10, 2022

You do not have access to this resource.
Click here to request your free trial access!

Already subscribed? Log in!


Français

7. Glossary

photo-commutator antenna; photoconductive antenna

A device that detects (or emits) electromagnetic fields whose spectrum extends beyond THz. Two electrodes are deposited on a resistive semiconductor with a very short excited carrier lifetime. Illumination by an optical pulse creates an electron-hole plasma in the space between the electrodes. These photo-carriers are accelerated by the THz wave field simultaneously bathing the device, and the induced electric current is proportional to the THz field at that instant.

corps noir; black body

A body that perfectly absorbs all the electromagnetic radiation that illuminates it, whatever the frequency of that radiation. Kirchhoff's law indicates that this body is the most efficient emitter of so-called thermal radiation, according to Planck's law.

...

You do not have access to this resource.

Exclusive to subscribers. 97% yet to be discovered!

You do not have access to this resource.
Click here to request your free trial access!

Already subscribed? Log in!


The Ultimate Scientific and Technical Reference

A Comprehensive Knowledge Base, with over 1,200 authors and 100 scientific advisors
+ More than 10,000 articles and 1,000 how-to sheets, over 800 new or updated articles every year
From design to prototyping, right through to industrialization, the reference for securing the development of your industrial projects

This article is included in

Non-destructive testing

This offer includes:

Knowledge Base

Updated and enriched with articles validated by our scientific committees

Services

A set of exclusive tools to complement the resources

Practical Path

Operational and didactic, to guarantee the acquisition of transversal skills

Doc & Quiz

Interactive articles with quizzes, for constructive reading

Subscribe now!

Ongoing reading
Glossary