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Angular Optical Transparency Induced by Photonic Topological Transitions in Metamaterials
Author(s) -
Huo Pengcheng,
Liang Yuzhang,
Zhang Si,
Lu Yanqing,
Xu Ting
Publication year - 2018
Publication title -
laser and photonics reviews
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.778
H-Index - 116
eISSN - 1863-8899
pISSN - 1863-8880
DOI - 10.1002/lpor.201700309
Subject(s) - metamaterial , optics , photonics , ray , electromagnetically induced transparency , photonic metamaterial , diffraction , transparency (behavior) , physics , optoelectronics , light field , transformation optics , anisotropy , topology (electrical circuits) , computer science , computer security , mathematics , combinatorics
Photonic topological transitions (PTTs) in metamaterials open a new realm of research with a number of interesting optical phenomena and provide an efficient route to manipulate light–matter interactions at nanoscale. Here, it is shown that, by tailoring the topology of anisotropic metamaterial's equi‐frequency surface, a narrow angular optical transparency window appears around the PTT frequency, which makes the metamaterial strongly discriminate the light based primarily on the angle of incidence. In experimental implementation, a large‐scale nanowire metamaterial is fabricated by bottom‐up approach and achieves a highly transparent window with a narrow angular range at visible frequency. Based on this angular transparency effect, the metamaterial is further demonstrated to be capable of significantly suppressing the diffraction and interference of the light scattered from arbitrarily shaped objects and projecting their diffraction‐limited images into far field. These features make the metamaterials hold promise for a series of angle‐dependent optical applications.