We use cookies on this site. By browsing our site you agree to our use of cookies. Close this message Find out more

Home > Physics > Research > Condensed Matter > Nanophysics and technology > Terahertz radiation quantum dot detectors
More in this section Nanophysics and technology

Terahertz radiation quantum dot detectors

Terahertz photons could resonantly excite plasma oscillations in quantum dot (QD) formed in two dimensional electron gas (2DEG). The plasma oscillations in decay by emitting the electrons from the QD, thus leaving the QD in a charge excited state. The latter is probed by a sensitive electrometer placed nearby, such as a single electron transistor (SET) or a point contact (PC), see the picture. In such a way a single photon detector of terahertz radiation can be made. There are interesting phenomena behind operation of these QD-SET and QD-PC sensors, including physics of plasma oscillations, Coulomb blockade, quantum wells, and cryogenic temperatures. As well it is a challenging task to fabricate such a nano-scale device. There is even more interesting and challenging task of application of the single photon THz sensors: deep space observation, health screening, security surveillance. In our group we cover all these areas, which makes research stimulating, exciting and rewarding.



Nanophysics and Nanotechnology  


Comment on this page

Did you find the information you were looking for? Is there a broken link or content that needs updating? Let us know so we can improve the page.

Note: If you need further information or have a question that cannot be satisfied by this page, please call our switchboard on +44 (0)1784 434455.

This window will close when you submit your comment.

Add Your Feedback