A novel quantum cascade laser design with "two-step" coupling between the injector and the upper laser state is demonstrated to achieve a widely voltage-tunable laser spectrum. Electroluminescence from this design can be tuned over a range of more than 200 cm-1 with a tuning coefficient of ∼700 cm-1 /V per stage. Lasers based on this design provide a tuning range of ∼100 cm-1 (8.3-9 μm) above threshold with a tuning coefficient of ∼900 cm-1 /V per stage at a constant temperature of 295 K.
ASJC Scopus subject areas
- Physics and Astronomy (miscellaneous)