Direct Generation of Tunable Orbital Angular Momentum Beams in Microring Lasers with Broadband Exceptional Points

William E. Hayenga, Midya Parto, Jinhan Ren, Fan O. Wu, Mohammad P. Hokmabadi, Christian Wolff, Ramy El-Ganainy, N. Asger Mortensen, Demetrios N. Christodoulides, Mercedeh Khajavikhan*

*Corresponding author for this work

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

Non-Hermitian exceptional points (EPs) represent a special type of degeneracy where not only the eigenvalues coalesce, but also the eigenstates tend to collapse on each other. Recent studies have shown that, in the presence of an EP, light-matter interactions are profoundly modified, leading to a host of unexpected optical phenomena ranging from enhanced sensitivity to chiral light transport. Here we introduce a family of unidirectional resonators based on a novel type of broadband exceptional points. In active settings, the resulting unidirectionality exhibits resilience to perturbations, thus, providing a robust and tunable approach for directly generating beams with distinct orbital angular momenta (OAM). This work could open up new possibilities for manipulating OAM degrees of freedom in applications pertaining to telecommunications and quantum information sciences, while at the same time may expand the notions of non-Hermiticity in the orbital angular momentum space.

Original languageEnglish
JournalACS Photonics
Volume6
Issue number8
Pages (from-to)1895-1901
ISSN2330-4022
DOIs
Publication statusPublished - 21. Aug 2019

Fingerprint

Angular momentum
angular momentum
Information Science
broadband
orbitals
Lasers
lasers
resilience
Information science
Degrees of freedom (mechanics)
Telecommunication
telecommunication
Resonators
eigenvectors
eigenvalues
degrees of freedom
resonators
perturbation
sensitivity
interactions

Keywords

  • chirality
  • exceptional point
  • microresonator
  • microring laser
  • non-Hermitian
  • orbital angular momentum

Cite this

Hayenga, William E. ; Parto, Midya ; Ren, Jinhan ; Wu, Fan O. ; Hokmabadi, Mohammad P. ; Wolff, Christian ; El-Ganainy, Ramy ; Mortensen, N. Asger ; Christodoulides, Demetrios N. ; Khajavikhan, Mercedeh. / Direct Generation of Tunable Orbital Angular Momentum Beams in Microring Lasers with Broadband Exceptional Points. In: ACS Photonics. 2019 ; Vol. 6, No. 8. pp. 1895-1901.
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title = "Direct Generation of Tunable Orbital Angular Momentum Beams in Microring Lasers with Broadband Exceptional Points",
abstract = "Non-Hermitian exceptional points (EPs) represent a special type of degeneracy where not only the eigenvalues coalesce, but also the eigenstates tend to collapse on each other. Recent studies have shown that, in the presence of an EP, light-matter interactions are profoundly modified, leading to a host of unexpected optical phenomena ranging from enhanced sensitivity to chiral light transport. Here we introduce a family of unidirectional resonators based on a novel type of broadband exceptional points. In active settings, the resulting unidirectionality exhibits resilience to perturbations, thus, providing a robust and tunable approach for directly generating beams with distinct orbital angular momenta (OAM). This work could open up new possibilities for manipulating OAM degrees of freedom in applications pertaining to telecommunications and quantum information sciences, while at the same time may expand the notions of non-Hermiticity in the orbital angular momentum space.",
keywords = "chirality, exceptional point, microresonator, microring laser, non-Hermitian, orbital angular momentum",
author = "Hayenga, {William E.} and Midya Parto and Jinhan Ren and Wu, {Fan O.} and Hokmabadi, {Mohammad P.} and Christian Wolff and Ramy El-Ganainy and Mortensen, {N. Asger} and Christodoulides, {Demetrios N.} and Mercedeh Khajavikhan",
year = "2019",
month = "8",
day = "21",
doi = "10.1021/acsphotonics.9b00779",
language = "English",
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Hayenga, WE, Parto, M, Ren, J, Wu, FO, Hokmabadi, MP, Wolff, C, El-Ganainy, R, Mortensen, NA, Christodoulides, DN & Khajavikhan, M 2019, 'Direct Generation of Tunable Orbital Angular Momentum Beams in Microring Lasers with Broadband Exceptional Points', ACS Photonics, vol. 6, no. 8, pp. 1895-1901. https://doi.org/10.1021/acsphotonics.9b00779

Direct Generation of Tunable Orbital Angular Momentum Beams in Microring Lasers with Broadband Exceptional Points. / Hayenga, William E.; Parto, Midya; Ren, Jinhan; Wu, Fan O.; Hokmabadi, Mohammad P.; Wolff, Christian; El-Ganainy, Ramy; Mortensen, N. Asger; Christodoulides, Demetrios N.; Khajavikhan, Mercedeh.

In: ACS Photonics, Vol. 6, No. 8, 21.08.2019, p. 1895-1901.

Research output: Contribution to journalJournal articleResearchpeer-review

TY - JOUR

T1 - Direct Generation of Tunable Orbital Angular Momentum Beams in Microring Lasers with Broadband Exceptional Points

AU - Hayenga, William E.

AU - Parto, Midya

AU - Ren, Jinhan

AU - Wu, Fan O.

AU - Hokmabadi, Mohammad P.

AU - Wolff, Christian

AU - El-Ganainy, Ramy

AU - Mortensen, N. Asger

AU - Christodoulides, Demetrios N.

AU - Khajavikhan, Mercedeh

PY - 2019/8/21

Y1 - 2019/8/21

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AB - Non-Hermitian exceptional points (EPs) represent a special type of degeneracy where not only the eigenvalues coalesce, but also the eigenstates tend to collapse on each other. Recent studies have shown that, in the presence of an EP, light-matter interactions are profoundly modified, leading to a host of unexpected optical phenomena ranging from enhanced sensitivity to chiral light transport. Here we introduce a family of unidirectional resonators based on a novel type of broadband exceptional points. In active settings, the resulting unidirectionality exhibits resilience to perturbations, thus, providing a robust and tunable approach for directly generating beams with distinct orbital angular momenta (OAM). This work could open up new possibilities for manipulating OAM degrees of freedom in applications pertaining to telecommunications and quantum information sciences, while at the same time may expand the notions of non-Hermiticity in the orbital angular momentum space.

KW - chirality

KW - exceptional point

KW - microresonator

KW - microring laser

KW - non-Hermitian

KW - orbital angular momentum

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DO - 10.1021/acsphotonics.9b00779

M3 - Journal article

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VL - 6

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JF - A C S Photonics

SN - 2330-4022

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