Xiaofei Xu et al 2008 New J. Phys. 10 115027 doi:10.1088/1367-2630/10/11/115027
Electromagnetic beam modulation through transformation optical structures
Focus on Cloaking and Transformation OpticsXiaofei Xu, Yijun Feng1 and Tian Jiang
Show affiliationsPart of Focus on Cloaking and Transformation Optics
The transformation media concept based on the form-invariant Maxwell's equations under coordinate transformations has opened up new possibilities of manipulating electromagnetic (EM) fields. In this paper, we report on application of the finite-embedded coordinate transformation method to the design of EM beam-modulating devices both in Cartesian coordinates and in cylindrical coordinates. By designing the material constitutive tensors of the transformation optical structures through different kinds of coordinate transformations, either the beamwidth of an incident Gaussian plane wave could be modulated by a slab or the wave-propagating direction of an omnidirectional source could be modulated through a cylindrical shell. We present the design procedures and the full-wave EM simulations that clearly confirm the good performance of the proposed beam-modulating devices.
- PACS
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03.50.De Classical electromagnetism, Maxwell equations
41.20.Jb Electromagnetic wave propagation; radiowave propagation
42.25.Bs Wave propagation, transmission and absorption
- Subjects
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Accelerators, beams and electromagnetism
- Dates
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Issue 11 (November 2008)
Received 31 May 2008
Published 27 November 2008
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Electromagnetic beam modulation through transformation optical structures
Xiaofei Xu et al 2008 New J. Phys. 10 115027
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