Distributed feedback terahertz frequency quantum cascade lasers with dual periodicity gratings
- School of Electronic and Electrical Engineering, University of Leeds, Leeds LS2 9JT (United Kingdom)
- Dipartimento di Fisica, Università di Pisa, Largo Pontecorvo 3 and NEST, CNR - Istituto Nanoscienze, 56127 Pisa (Italy)
We have developed terahertz frequency quantum cascade lasers that exploit a double-periodicity distributed feedback grating to control the emission frequency and the output beam direction independently. The spatial refractive index modulation of the gratings necessary to provide optical feedback at a fixed frequency, and simultaneously, a far-field emission pattern centered at controlled angles, was designed through use of an appropriate wavevector scattering model. Single mode terahertz (THz) emission at angles tuned by design between 0° and 50° was realized, leading to an original phase-matching approach for highly collimated THz quantum cascade lasers.
- OSTI ID:
- 22395633
- Journal Information:
- Applied Physics Letters, Journal Name: Applied Physics Letters Journal Issue: 1 Vol. 106; ISSN APPLAB; ISSN 0003-6951
- Country of Publication:
- United States
- Language:
- English
Similar Records
A hybrid plasmonic waveguide terahertz quantum cascade laser
Electrically tunable terahertz quantum cascade lasers based on a two-sections interdigitated distributed feedback cavity
Widely tunable room temperature semiconductor terahertz source
Journal Article
·
Sun Feb 22 23:00:00 EST 2015
· Applied Physics Letters
·
OSTI ID:22412691
Electrically tunable terahertz quantum cascade lasers based on a two-sections interdigitated distributed feedback cavity
Journal Article
·
Mon Mar 30 00:00:00 EDT 2015
· Applied Physics Letters
·
OSTI ID:22398802
Widely tunable room temperature semiconductor terahertz source
Journal Article
·
Sun Nov 16 23:00:00 EST 2014
· Applied Physics Letters
·
OSTI ID:22391988