Frequency dependence of the maximum operating temperature for quantum-cascade lasers up to 5.4 THz
- Paul-Drude-Institut für Festkörperelektronik, Hausvogteiplatz 5–7, 10117 Berlin (Germany)
We report on the observation of an approximately linear reduction in the maximum operating temperature with an increasing emission frequency for terahertz quantum-cascade lasers between 4.2 and 5.4 THz. These lasers are based on the same design type, but vary in period length and barrier height for the cascade structure. The sample emitting at the highest frequency around 5.4 THz can be operated in pulsed mode up to 56 K. We identify an additional relaxation channel for electrons by longitudinal optical phonon scattering from the upper to the lower laser level and increasing optical losses toward higher frequencies as major processes, leading to the observed temperature behavior.
- OSTI ID:
- 22486089
- Journal Information:
- Applied Physics Letters, Vol. 107, Issue 20; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6951
- Country of Publication:
- United States
- Language:
- English
Similar Records
Temperature Dependences of the Threshold Current and Output Power of a Quantum-Cascade Laser Emitting at 3.3 THz
Resonant-phonon-assisted THz quantum cascade lasers with metal-metal waveguides.
Mode loss spectra in THz quantum-cascade lasers with gold- and silver-based double metal waveguides
Journal Article
·
Thu Nov 15 00:00:00 EST 2018
· Semiconductors
·
OSTI ID:22486089
+8 more
Resonant-phonon-assisted THz quantum cascade lasers with metal-metal waveguides.
Journal Article
·
Tue Jun 01 00:00:00 EDT 2004
· Proposed for publication in Semiconductor Science and Technology.
·
OSTI ID:22486089
+3 more
Mode loss spectra in THz quantum-cascade lasers with gold- and silver-based double metal waveguides
Journal Article
·
Sat Dec 01 00:00:00 EST 2018
· Quantum Electronics (Woodbury, N.Y.)
·
OSTI ID:22486089
+4 more