Cart (Loading....) | Create Account
Close category search window

Terahertz time domain spectroscopy of phonon-depopulation based quantum cascade lasers

Sign In

Cookies must be enabled to login.After enabling cookies , please use refresh or reload or ctrl+f5 on the browser for the login options.

Formats Non-Member Member
$31 $31
Learn how you can qualify for the best price for this item!
Become an IEEE Member or Subscribe to
IEEE Xplore for exclusive pricing!
close button

puzzle piece

IEEE membership options for an individual and IEEE Xplore subscriptions for an organization offer the most affordable access to essential journal articles, conference papers, standards, eBooks, and eLearning courses.

Learn more about:

IEEE membership

IEEE Xplore subscriptions

11 Author(s)
Jukam, N. ; Laboratoire Pierre Aigrain, Ecole Normale Supérieure, UMR8551 CNRS, 75231 Paris Cedex 05, France ; Dhillon, S.S. ; Oustinov, D. ; Madeo, J.
more authors

Your organization might have access to this article on the publisher's site. To check, click on this link: 

The gain and loss in a terahertz quantum cascade laser based on a longitudinal optical phonon depopulation scheme is studied using terahertz time domain spectroscopy. At laser threshold the gain is found to be clamped at 25 cm-1 for a 1 mm long device and the full width at half maximum of the spectral gain during laser action is 0.6 THz. At low biases, before laser action, significant absorption features are observed for frequencies lower and higher than the laser emission frequency. We assign their onset to the lower laser level being populated from a parasitic electronic channel. The absorption transitions are identified from bandstructure simulations and from the oscillator strengths of the subband transitions as a function of the applied field.

Published in:

Applied Physics Letters  (Volume:94 ,  Issue: 25 )

Date of Publication:

Jun 2009

Need Help?

IEEE Advancing Technology for Humanity About IEEE Xplore | Contact | Help | Terms of Use | Nondiscrimination Policy | Site Map | Privacy & Opting Out of Cookies

A not-for-profit organization, IEEE is the world's largest professional association for the advancement of technology.
© Copyright 2014 IEEE - All rights reserved. Use of this web site signifies your agreement to the terms and conditions.