Realization of exceptional points along a synthetic orbital angular momentum dimension.
Realization of exceptional points along a synthetic orbital angular momentum dimension.
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沿合成轨道角动量维度实现异常点
DOI:
10.1126/sciadv.abp8943
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发表时间:
2023-01-25
期刊:
影响因子:
13.6
通讯作者:
中科院分区:
文献类型:
--
作者:
Exceptional points (EPs), at which more than one eigenvalue and eigenvector coalesce, are unique spectral features of non-Hermiticity (NH) systems. They exist widely in open systems with complex energy spectra. We experimentally demonstrate the appearance of paired EPs in a periodical-driven degenerate optical cavity along the synthetic orbital angular momentum dimension with a tunable parameter. The complex-energy band structures and the key features of EPs, i.e., their bulk Fermi arcs, parity-time symmetry breaking transition, energy swapping, and half-integer band windings, are directly observed by detecting the wavefront angle–resolved transmission spectrum. Our results demonstrate the flexibility of using the photonic synthetic dimensions to implement NH systems beyond their geometric dimension and EP-based sensing.
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影响因子:
16.6
作者:
Luo XW;Zhou X;Li CF;Xu JS;Guo GC;Zhou ZW
通讯作者:
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影响因子:
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作者:
ARNAUD, JA
通讯作者:
ARNAUD, JA
DOI:
10.1364/josaa.25.003043
发表时间:
2008-12-01
影响因子:
1.9
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通讯作者:
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