ABSTRACT
We report unusual characteristics of a photonic quantum ring(PQR) laser fabricated from vertical-cavity surface emitting laser(VCSEL)-like structure. The device shows the simultaneous lasing characteristics of extra-cavity evanescent emission of WG mode resonance excited by PQR and intra-cavity VCSEL mode with a high order transverse mode with 10-fold rotational symmetry. As another quantum-wire property, a distinct feature of https://www.w3.org/1998/Math/MathML"> T https://s3-euw1-ap-pe-df-pch-content-public-p.s3.eu-west-1.amazonaws.com/9781003063100/ce4a879a-688a-4c77-a95b-e9b91ed32a4e/content/inline-math2.tif" xmlns:xlink="https://www.w3.org/1999/xlink"/> -dependent spectral shifts appears for the PQR mode, in sharp contrast to the typical linear behavior of the VCSEL. Also, the experimental threshold currents with various device diameters(ϕ = 6 48 μm) show good agreement with the values calculated by quantum wire view.
