CONFERENCE PROCEEDINGS
Advanced Search
Home > Proceedings > Volume 4651 > Article
Paper
22 May 2002 Quantum cascade lasers and metal waveguides at λ > 20 μm
Raffaele Colombelli, Federico Capasso, Karl Unterrainer, Claire F. Gmachl, A. Michael Sergent, Deborah L. Sivco, Alfred Y. Cho
Author Affiliations +
Proceedings Volume 4651, Novel In-Plane Semiconductor Lasers; (2002) https://doi.org/10.1117/12.467942
Event: Symposium on Integrated Optoelectronic Devices, 2002, San Jose, California, United States
Abstract
The realization of Quantum Cascade lasers at very long wavelengths is of particular interest due to the lack of narrow-band, powerful sources in the far-infrared range of the electromagnetic spectrum. We report Quantum Cascade lasers operating above 20micrometers (at (lambda) =21.5micrometers and (lambda) =24micrometers ) wavelengths, with pulsed operation up to 140 K and with a peak power of few milliwatts at cryogenic temperatures. Increased accuracy in the band-structure design becomes one of the key factors to assure high electron injection efficiency and to prevent hot-carrier effects. For this reason we developed a technique which allows the observation of intersubband spontaneous emission in unipolar Quantum Cascade lasers above threshold, a helpful instrument for device optimization. Finally, at these very long wavelengths various types of waveguide concepts have to be adopted in order to reduce the otherwise prohibitive layer thickness, enhance the optical confinement and control the waveguide loss. We report Quantum Cascade lasers with double metal-semiconductor waveguide resonators for operating wavelengths of 19, 21 and 24micrometers . The waveguides are based on surface-plasmon modes confined at the metal-semiconductor interfaces on both sides of the active region/injector stack and are not restricted by a cut-off wavelength for the TM polarized intersubband radiation.
© (2002) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Citation Download Citation
Raffaele Colombelli, Federico Capasso, Karl Unterrainer, Claire F. Gmachl, A. Michael Sergent, Deborah L. Sivco, and Alfred Y. Cho "Quantum cascade lasers and metal waveguides at λ > 20 μm", Proc. SPIE 4651, Novel In-Plane Semiconductor Lasers, (22 May 2002); https://doi.org/10.1117/12.467942
ACCESS THE FULL ARTICLE
ORGANIZATIONAL
Sign in with credentials provided by your organization.
INSTITUTIONAL
Select your institution to access the SPIE Digital Library.
SELECT YOUR INSTITUTION
PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.
PERSONAL SIGN IN
No SPIE Account? Create one
PURCHASE THIS CONTENT
SUBSCRIBE TO DIGITAL LIBRARY
50 downloads per 1-year subscription
Members: $195
Non-members: $335 ADD TO CART
25 downloads per 1 - year subscription
Members: $145
Non-members: $250 ADD TO CART
PURCHASE SINGLE ARTICLE
Includes PDF, HTML & Video, when available
Members: $17.00
Non-members: $21.00 ADD TO CART
PROCEEDINGS
 11 PAGES
DOWNLOAD PAPER SAVE TO MY LIBRARY
GET CITATION
Advertisement
Advertisement
RIGHTS & PERMISSIONS
Get copyright permission  Get copyright permission on Copyright Marketplace
KEYWORDS
Waveguides
Quantum cascade lasers
Laser damage threshold
Laser scattering
Metals
Absorption
Dielectrics
RELATED CONTENT
Subscribe to Digital Library
Receive Erratum Email Alert
Back to Top