We report on the fabrication and operation of quantum cascade ring lasers providing grating-coupled surface emission. The devices exhibit tunable far fields, ranging from spot- to ring-shaped symmetric beam cross sections, depending on the grating period. This-along with threshold current densities as low as for comparable Fabry-Ṕrot lasers-demonstrates the compatibility of reduced beam divergence and two-dimensional integrability, resulting in an attractive light source for applications in midinfrared spectroscopy and imaging. © 2008 American Institute of Physics.
CITATION STYLE
Mujagić, E., Schartner, S., Hoffmann, L. K., Schrenk, W., Semtsiv, M. P., Wienold, M., … Strasser, G. (2008). Grating-coupled surface emitting quantum cascade ring lasers. Applied Physics Letters, 93(1). https://doi.org/10.1063/1.2958910
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