Abstract-Electrically tunable terahertz quantum cascade lasers based on a two-sections interdigitated distributed feedback cavity

Dana Turčinková¹, Maria Ines Amanti^1,2, Giacomo Scalari¹, Mattias Beck¹ andJérôme Faist¹
http://scitation.aip.org/content/aip/journal/apl/106/13/10.1063/1.4916653
1 ETH Zurich, Institute for Quantum Electronics, Auguste-Piccard-Hof 1, 8093 Zurich, Switzerland
2 Univ. Paris Diderot, Lab. Matererk iaux et Phenomenes Quantiques, F-75205 Paris, France
Appl. Phys. Lett. 106, 131107 (2015); http://dx.doi.org/10.1063/1.4916653

The continuous electrical tuning of a single-mode terahertz quantum cascade laser operating at a frequency of 3 THz is demonstrated. The devices are based on a two-section interdigitated third-order distributed feedback cavity. The lasers can be tuned of about 4 GHz at a constant optical output power of 0.7 mW with a good far-field pattern.