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Topologically protected complete polarization conversion
- 发表刊物：Physical review letters
- 摘要：We consider the process of conversion between linear polarizations as light is reflected from a photonic crystal slab. We observe that, over a wide range of frequencies, complete polarization conversion can be found at isolated wave vectors. Moreover, such an effect is topological: the complex reflection coefficients have a nonzero winding number in the wave vector space. We also show that bound states in continuum in this system have their wave vectors lying on the critical coupling curve that defines the condition for complete polarization conversion. Our work points to the use of …
- 卷号：119
- 期号：16
- 页面范围：167401
- 是否译文：否
- 发表时间：2017-10-18
- 发布期刊链接：https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.119.167401
