Broadband heterogeneous terahertz frequency quantum cascade laser. Issue 21 (1st October 2018)

• Record Type: Journal Article
• Authors: Li, L.H.; Garrasi, K.; Kundu, I.; Han, Y.J.; Salih, M.; Vitiello, M.S.; Davies, A.G.; Linfield, E.H.
• Is Part Of: Electronics letters. Volume 54:Issue 21(2018)
• Page Start: 1229
• Page End: 1231
• Publication Date: 2018-10-01
• Subjects: current density -- quantum cascade lasers -- phonons -- microwave photonics; temperature 15 K -- frequency 2.4 THz to 3.4 THz -- temperature 15.0 K -- emission spectrum -- threshold current density -- longitudinal optical‐phonon‐assisted interminiband transitions -- continuous wave laser emission -- active region design -- broadband heterogeneous terahertz frequency quantum cascade laser; Electronics -- Periodicals; 621.381
• DOI: 10.1049/el.2018.6062
• Languages: English
• ISSNs: 0013-5194

Abstract

Abstract : The authors demonstrate a broadband, heterogeneous terahertz frequency quantum cascade laser by exploiting an active region design based on longitudinal optical‐phonon‐assisted interminiband transitions. They obtain continuous wave laser emission with a threshold current density of ∼120 A/cm 2, a dynamic range of ∼3.1, and an emission spectrum spanning from 2.4 to 3.4 THz at 15 K.