Modes of structurally chiral lasers
Open Access
- 12 November 2014
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review A
- Vol. 90 (5), 053824
- https://doi.org/10.1103/physreva.90.053824
Abstract
We employ coupled wave theory to enumerate the lasing modes of structurally chiral lasers. The elliptical modes are shown to be fundamentally distinct from those of a scalar distributed feedback laser. High threshold modes are shown to lase with the opposite chirality as the active medium, in contrast to their low-threshold counterparts that lase with the same chirality as the active medium. The lasing mode structure suggests the intriguing possibility of dynamically changing the polarization handedness of a chiral laser, as well as the possibility of lasing within the forbidden band-gap region. These observations arise from the fundamental interplay between the distributed chirality-preserving reflections within the active medium and the localized chirality-reversing reflections at the medium's boundaries.Keywords
Funding Information
- Engineering and Physical Sciences Research Council
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