A patch-array antenna single-mode low electrical dissipation continuous wave terahertz quantum cascade laser

We introduce a double metal terahertzquantum cascade laser meant for astrophysical heterodyne measurements. The laser ridge is embedded in benzocyclobutene, and the device exhibits single mode, continuouswave operation around 4.745 THz with a peak power of almost 1.8 mW at 10  K and a power consumption of ≈1.6 W. Moreover, thanks to the integration of a top metal contact with a patch arrayantenna for light out-coupling the beam of the emitted light has a low-divergence single-lobe profile and an FWHM of ≈30°.

Source: Applied Physics Letters - November 14, 2016 Category: Physics Authors: L. Bosco, C. Bonzon, K. Ohtani, M. Justen, M. Beck and J. Faist Source Type: research