Metal-metal terahertz quantum cascade laser with micro-transverse-electromagnetic-horn antenna

Maineult, Wilfried; Gellie, Pierre; Andronico, Alessio; Filloux, Pascal; Leo, Giuseppe; Sirtori, Carlo; Barbieri, Stefano; Peytavit, Emilien; Akalin, Tahsin; Lampin, Jean-Francois; Beere, Harvey E.; Ritchie, David A.
November 2008
Applied Physics Letters;11/3/2008, Vol. 93 Issue 18, p183508
Academic Journal
A 2.8 THz metal-metal quantum cascade laser operating with a microtransverse-electromagnetic-horn antenna has been demonstrated. By comparing the far-field radiation pattern to a standard ridge cavity with a cleaved facet, a striking improvement of the directionality is observed. The effectiveness of the horn antenna is critically dependent on the control of the lateral modes in the laser cavity.


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