Search Menu
Photonics Media Photonics Marketplace Photonics Spectra BioPhotonics EuroPhotonics Vision Spectra Photonics Showcase Photonics ProdSpec Photonics Handbook

3-Color Photodetector Explored for IR Color Television, Imaging Systems

Facebook Twitter LinkedIn Email Comments
A three-color, shortwave-midwave-longwave IR photodetector could be used to create IR color televisions and imaging systems.

"A device capable of detecting different IR wavebands is highly desirable in next-generation IR imaging systems," said professor Manijeh Razeghi of Northwestern University.

Razeghi and her team invented and investigated the design for three-color photodiodes without using additional terminal contacts. The resulting device is based on InAs/GaSb/AlSb type-II superlattices. As the applied bias voltage varied, the photodetector sequentially exhibited the behavior of three different colors, corresponding to the bandgap of three absorbers, and achieved well-defined cut-off wavelengths and high-quantum efficiency in each channel, the researchers said.

This research, published in Scientific Reports (doi: 10.1038/srep24144) builds on the Razeghi group's many years of work in Northwestern's Center for Quantum Devices, including the development of the first single-color, short-wavelength IR photodetector and two-color, shortwave-midwave IR photodetector based on type-II superlattices.

Photonics Spectra
Jul 2016
A device used to sense incident radiation.
Research & TechnologyAmericaspeopleManijeh RazeghiNorthwesterneducationinfraredphotodetectorimagingDisplaysphotodiodeTech Pulse

back to top
Facebook Twitter Instagram LinkedIn YouTube RSS
©2021 Photonics Media, 100 West St., Pittsfield, MA, 01201 USA, [email protected]

Photonics Media, Laurin Publishing
x Subscribe to Photonics Spectra magazine - FREE!
We use cookies to improve user experience and analyze our website traffic as stated in our Privacy Policy. By using this website, you agree to the use of cookies unless you have disabled them.