THz quantum-cascade VECSELs based upon disordered metasurfaces

Eilam Morag; Sandra Li; Anthony Kim; Sadhvikas J. Addamane; Benjamin S. Williams

doi:10.1117/12.2648477

17 March 2023 THz quantum-cascade VECSELs based upon disordered metasurfaces

Eilam Morag, Sandra Li, Anthony Kim, Sadhvikas J. Addamane, Benjamin S. Williams

Proceedings Volume 12404, Vertical External Cavity Surface Emitting Lasers (VECSELs) XII; 124040E (2023) https://doi.org/10.1117/12.2648477
Event: SPIE LASE, 2023, San Francisco, California, United States

Abstract

We demonstrate a THz quantum-cascade vertical-external-cavity surface-emitting laser (QC-VECSEL) based on a disordered amplifying metasurface. One-dimensional disorder is introduced into the metasurface by pseudo-randomly varying the width of uniformly spaced ridge antennas. A mid-sized QC-VECSEL was characterized as a function of its external cavity length. In general, short cavities exhibited more modes: as many as seven were observed. Typical beam patterns were overall circular, albeit with several hot spots. We hypothesize that extending the disorder to two dimensions and increasing the metasurface size should increase the mode number by at least a factor of 10.

Conference Presentation

Citation Download Citation

Eilam Morag, Sandra Li, Anthony Kim, Sadhvikas J. Addamane, and Benjamin S. Williams "THz quantum-cascade VECSELs based upon disordered metasurfaces", Proc. SPIE 12404, Vertical External Cavity Surface Emitting Lasers (VECSELs) XII, 124040E (17 March 2023); https://doi.org/10.1117/12.2648477

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