文章基本信息

标题：Band gap formation and Anderson localization in disordered photonic materials with structural correlations
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作者：Luis S. Froufe-Pérez ; Michael Engel ; Juan José Sáenz 等
期刊名称：Proceedings of the National Academy of Sciences
印刷版ISSN：0027-8424
电子版ISSN：1091-6490
出版年度：2017
卷号：114
期号：36
页码：9570-9574
DOI：10.1073/pnas.1705130114
语种：English
出版社：The National Academy of Sciences of the United States of America
摘要：Disordered dielectric materials with structural correlations show unconventional optical behavior: They can be transparent to long-wavelength radiation, while at the same time have isotropic band gaps in another frequency range. This phenomenon raises fundamental questions concerning photon transport through disordered media. While optical transparency in these materials is robust against recurrent multiple scattering, little is known about other transport regimes like diffusive multiple scattering or Anderson localization. Here, we investigate band gaps, and we report Anderson localization in 2D disordered dielectric structures using numerical simulations of the density of states and optical transport statistics. The disordered structures are designed with different levels of positional correlation encoded by the degree of stealthiness χ . To establish a unified view, we propose a correlation-frequency ( χ – ν ) transport phase diagram. Our results show that, depending only on χ , a dielectric material can transition from localization behavior to a band gap crossing an intermediate regime dominated by tunneling between weakly coupled states.
关键词：disordered photonics ; photonic band gap materials ; Anderson localization of light ; mesoscopic wave transport ; hyperuniform structures