Close

Search

Search Menu
Photonics Media Photonics Buyers' Guide Photonics EDU Photonics Spectra BioPhotonics EuroPhotonics Industrial Photonics Photonics Showcase Photonics ProdSpec Photonics Handbook
More News
share
Email Facebook Twitter Google+ LinkedIn Comments

Free-Electron Laser Emits in the Far-Infrared

Photonics Spectra
Aug 1999
Scientists have sought a convenient source of radiation in the far-infrared portion of the spectrum for the study of semiconductor nanostructures and constituents in the atmosphere. In an effort to achieve that, researchers from Dartmouth College in Hanover, N.H., have built a compact, low-power free-electron laser that generates tunable coherent beams from 10 µm to 1 mm. They modified a scanning electron microscope to send a beam of electrons across a metal diffraction grating so that electromagnetic coupling forms oscillating arrays that emit IR light. By tuning the grating period, the user can tune the wavelength.

MicroscopyResearch & TechnologyTech Pulse

Comments
Terms & Conditions Privacy Policy About Us Contact Us
back to top

Facebook Twitter Instagram LinkedIn YouTube RSS
©2018 Photonics Media, 100 West St., Pittsfield, MA, 01201 USA, info@photonics.com
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.