Tunable Orbital Angular Momentum Microring Lasers Using Chiral Exceptional Points

W. E. Hayenga, University of Central Florida
J. Ren, University of Central Florida
M. Parto, University of Central Florida
F. Wu, University of Central Florida
M. P. Hokmabadi, University of Central Florida
C. Wolff, Syddansk Universitet
R. El-Ganainy, Michigan Technological University
N. A. Mortensen, Syddansk Universitet
D. N. Christodoulides, University of Central Florida
M. Khajavikhan, University of Central Florida

Abstract

© 2019 The Author(s) 2019 OSA. 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.