Tunable topological charge vortex microlaser

Zhifeng Zhang, Xingdu Qiao, Bikashkali Midya, Kevin Liu, Jingbo Sun, Tianwei Wu, Wenjing Liu, Ritesh Agarwal, Josep Miquel Jornet, Stefano Longhi, Natalia M. Litchinitser, Liang Feng

Research output: Contribution to journalArticlepeer-review

181 Scopus citations

Abstract

The orbital angular momentum (OAM) intrinsically carried by vortex light beams holds a promise for multidimensional high-capacity data multiplexing, meeting the ever-increasing demands for information. Development of a dynamically tunable OAM light source is a critical step in the realization of OAM modulation and multiplexing. By harnessing the properties of total momentum conservation, spin-orbit interaction, and optical non-Hermitian symmetry breaking, we demonstrate an OAM-tunable vortex microlaser, providing chiral light states of variable topological charges at a single telecommunication wavelength. The scheme of the non–Hermitian-controlled chiral light emission at room temperature can be further scaled up for simultaneous multivortex emissions in a flexible manner. Our work provides a route for the development of the next generation of multidimensional OAM-spin-wavelength division multiplexing technology.
Original languageEnglish (US)
Pages (from-to)760-763
Number of pages4
JournalScience
Volume368
Issue number6492
DOIs
StatePublished - May 14 2020
Externally publishedYes

Bibliographical note

KAUST Repository Item: Exported on 2020-10-01
Acknowledgements: We acknowledge the support from the National Science Foundation (NSF) (ECCS-1932803, ECCS-1846766, ECCS-1842612, OMA 1936276, CMMI-1635026, DMR-1809518, IIP-1718177, and CNS-2011411), U.S. Army Research Office (ARO) (W911NF-19-1-0249),
and King Abdullah University of Science and Technology (grant OSR-2016-CRG5-2950-04). This research was partially supported
by NSF through the University of Pennsylvania Materials Research Science and Engineering Center (MRSEC) (DMR-1720530). This work
was carried out in part at the Singh Center for Nanotechnology, which is supported by the NSF National Nanotechnology Coordinated
Infrastructure Program under grant NNCI-1542153.

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