Broadband THz QCLs

We demonstrate a broadband, heterogeneous terahertz frequency quantum cascade laser by exploiting an active region design based on longitudinal optical (LO)-phonon-assisted interminiband transitions. We obtain continuous wave laser emission with a low threshold current densities of 120 A/cm2, a dynamic range of 3.1, and an emission spectrum spanning from 2.4 to 3.4 THz at 15 K.

The full publication can be accessed here