Abstract
A microring laser generating tunable orbital angular momentum states via chiral exceptional points is demonstrated. An incorporated inner S-bend waveguide construct provides an avenue to enforce unidirectional lasing in a predetermined manner.
| Originalsprog | Engelsk |
|---|---|
| Titel | Conference on Lasers and Electro-Optics |
| Forlag | IEEE |
| Publikationsdato | 1. maj 2019 |
| Artikelnummer | 8750063 |
| ISBN (Trykt) | 978-1-7281-3718-6 |
| ISBN (Elektronisk) | 978-1-943580-57-6 |
| DOI | |
| Status | Udgivet - 1. maj 2019 |
| Begivenhed | 2019 Conference on Lasers and Electro-Optics, CLEO - San Jose, USA Varighed: 5. maj 2019 → 10. maj 2019 |
Konference
| Konference | 2019 Conference on Lasers and Electro-Optics, CLEO |
|---|---|
| Land/Område | USA |
| By | San Jose |
| Periode | 05/05/2019 → 10/05/2019 |
| Navn | Conference on Lasers and Electro-Optics |
|---|---|
| Vol/bind | 2019 |
| ISSN | 2160-9020 |
Finansiering
In conclusion, in this work we demonstrated a new type of exceptional point in microring resonators, resulting from the incorporation of an enclosed tapered S-shaped waveguide. Fabricated on an active III-V semiconductor platform, this type of microring structure is able to directly generate vector vortex beams with a tunable topological charge. Our work features the first realization of exceptional points with robust chirality in microring structures, and may open up new possibilities for studying non-Hermiticity in angular momentum space, vortex beam generation, as well as for sensing. Acknowledgments. ARO (W911NF-16-1-0013, W911NF-17-1-0481), NSF (ECCS 1454531, DMR-1420620, ECCS 1757025, CBET 1805200), DARPA(D18AP00058, HR00111820042, HR00111820038), ONR (N0001416-1-2640, N00014-18-1-2347), AFOSR (FA9550-14-1-0037), U.S.-Israel Binational Science Foundation (BSF) (2016381).
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