An omnidirectional retroreflector based on the transmutation of dielectric singularities
arXiv:0906.5214 · doi:10.1038/nmat2489
Abstract
In the field of transformation optics, metamaterials mimic the effect of coordinate transformations on electromagnetic waves, creating the illusion that the waves are propagating through a virtual space. Transforming space by appropriately designed materials makes devices possible that have been deemed impossible. In particular, transformation optics has led to the demonstration of invisibility cloaking for microwaves, surface plasmons and infrared light. Here we report the achievement of another "impossible task". We implement, for microwaves, a device that would normally require a dielectric singularity, an infinity in the refractive index. We transmute a singularity in virtual space into a mere topological defect in a real metamaterial. In particular, we demonstrate an omnidirectional retroreflector, a device for faithfully reflecting images and for creating high visibility, from all directions. Our method is robust, potentially broadband and similar techniques could be applied for visible light.
References in corpus (8)
- Optical Cloaking with Non-Magnetic Metamaterials
- Dielectric Optical Cloak
- Silicon nanostructure cloak operating at optical frequencies
- General Relativity in Electrical Engineering
- Notes on Conformal Invisibility Devices
- Electromagnetic cloaking in the visible frequency range
- Transformation Optics and the Geometry of Light
- Visual Observation and Quantitative Measurement of the Microwave Absorbing Effect at X band
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