### Abstract

Original language | English |
---|---|

Pages (from-to) | 053837 |

Journal | Physical Review A - Atomic, Molecular, and Optical Physics |

Volume | 96 |

Publication status | Published - 2017 |

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### Cite this

*Physical Review A - Atomic, Molecular, and Optical Physics*,

*96*, 053837.

**Spectral Transitions, Exceptional Points and Bifurcations \\ of the Fundamental Active Photonic Dimer.** / Bountis, Anastasios; Kovanis, Vassilios; Kominis, Yannis.

Research output: Contribution to journal › Article

*Physical Review A - Atomic, Molecular, and Optical Physics*, vol. 96, pp. 053837.

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TY - JOUR

T1 - Spectral Transitions, Exceptional Points and Bifurcations \\ of the Fundamental Active Photonic Dimer

AU - Bountis, Anastasios

AU - Kovanis, Vassilios

AU - Kominis, Yannis

PY - 2017

Y1 - 2017

N2 - he fundamental active photonic dimer consisting of two coupled lasers is studied in terms of the rate equation model. In comparison with coupled mode equation models, utilized so far for the study of spectral properties of such dimer, this model is much more realistic and has significantly richer set of dynamical features, suggesting a paradigm shift, in the field of non-Hermitian photonics. The model is studied in terms of its eigenvalue spectral properties that are shown to be directly related to observable features of the dimer. The eigenvalue spectrum of the zero-state possesses spectral transition properties and exceptional points under much more general conditions than those imposed by PT-symmetry, and its bifurcations explain experimentally observed self-termination effects. For the nonzero states of the system it is shown that the spectral transitions and exceptional points have an observable spectral signature in the spectral line shape of the system. The controllability of the spectral features in terms of detuning and pumping schemes suggests a versatile fundamental element for integrated photonics and a photonic molecule for active photonic metasurfaces.

AB - he fundamental active photonic dimer consisting of two coupled lasers is studied in terms of the rate equation model. In comparison with coupled mode equation models, utilized so far for the study of spectral properties of such dimer, this model is much more realistic and has significantly richer set of dynamical features, suggesting a paradigm shift, in the field of non-Hermitian photonics. The model is studied in terms of its eigenvalue spectral properties that are shown to be directly related to observable features of the dimer. The eigenvalue spectrum of the zero-state possesses spectral transition properties and exceptional points under much more general conditions than those imposed by PT-symmetry, and its bifurcations explain experimentally observed self-termination effects. For the nonzero states of the system it is shown that the spectral transitions and exceptional points have an observable spectral signature in the spectral line shape of the system. The controllability of the spectral features in terms of detuning and pumping schemes suggests a versatile fundamental element for integrated photonics and a photonic molecule for active photonic metasurfaces.

M3 - Article

VL - 96

SP - 053837

JO - Physical Review A

JF - Physical Review A

SN - 2469-9926

ER -