Reflectionless spatial beam benders with arbitrary bending angle by introducing optic-null medium into transformation optics

By introducing an optic-null medium into the finite embedded transformation, a reflectionless spatial beam bender is designed, which can steer the output beam by a fixed pre-designed angle β for an arbitrary incident angle. The bending angle β of the beam bender is determined by the geometrical angl...

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Bibliographic Details
Published in:Chinese physics B 2021-03, Vol.30 (3), p.34101-277
Main Authors: Sun, Fei, Liu, Yi-Chao, Yang, Yi-Biao, Fei, Hong-Ming, Chen, Zhi-Hui, He, Sai-Ling
Format: Article
Language:English
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Summary:By introducing an optic-null medium into the finite embedded transformation, a reflectionless spatial beam bender is designed, which can steer the output beam by a fixed pre-designed angle β for an arbitrary incident angle. The bending angle β of the beam bender is determined by the geometrical angle of the device, which can be changed by simply choosing different geometrical angles. For various bending angles, the designed spatial beam bender can be realized by the same materials ( i.e. , an optic-null medium), which is a homogenous anisotropic material. Numerical simulations verify the reflectionless bending effect and rotated imaging ability of the proposed beam bender. A reduction model of the optic-null medium is studied, which can also be used for a reflectionless spatial beam bender with a pre-designed bending angle.
ISSN:1674-1056
DOI:10.1088/1674-1056/abd38b