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VIDEO LIBRARY |
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Phase-sensitive symmetry breaking in microresonators with Kerr nonlinearity E. A. Anashkina |
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Abstract: Spontaneous symmetry breaking (SSB) is a fundamentally important concept known in many areas of physics: particle physics, condensed matter physics, and optics, to name a few. In photonics, there has been an increasing interest in studying symmetry breaking, chiral and nonreciprocal light propagation in optical macro- and microresonators with cubic nonlinearities. Here, we demonstrate theoretically and experimentally that linear coupling due to the backscattering between two counterpropagating modes in a microresonator with Kerr nonlinearity leads to extreme sensitivity of the intensity asymmetry of light states to the relative phase between the bidirectional pumps of equal power. In the absence of linear coupling, the relative pump phase does not affect counterpropagating intraresonator intensities, and two asymmetric states arise due to spontaneous symmetry breaking. Contrariwise, in the presence of weak linear intermode coupling, the asymmetry of the states is deterministically controlled via changes in phase (for all phases except 0 and The work was supported by the Russian Science Foundation, grant No.20-72-10188-P. E.A. Anashkina, A.V. Andrianov, “Phase-sensitive symmetry breaking in bidirectionally pumped Kerr microresonators,” arXiv preprint arXiv:2407.07594 (2024). Language: English |