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Published on: September 25, 2020
Macroscopic invisibility cloaking of visible light
Xianzhong Chen1, Yu Luo, Jingjing Zhang
1School of Physics and Astronomy, University of Birmingham, Birmingham B15 2TT, UK.
Nature Communications
|February 3, 2011
Summary
Scientists created a macroscopic invisibility cloak using natural crystals, hiding objects at visible frequencies. This breakthrough moves beyond small-scale cloaks made from artificial materials.
Area of Science:
- Optics and Photonics
- Materials Science
- Electromagnetism
Background:
- Invisibility cloaks, once fictional, are now scientifically realized using transformation optics.
- Previous electromagnetic invisibility cloaks were limited to nano- or micro-scales due to artificial composite materials.
- These limitations restricted cloaked regions to only a few wavelengths.
Purpose of the Study:
- To report the first realization of a macroscopic volumetric invisibility cloak.
- To demonstrate cloaking at visible frequencies using natural birefringent crystals.
- To overcome the size limitations of previous invisibility cloak technologies.
Main Methods:
- Utilized natural birefringent crystals for cloak construction.
- Operated the cloak at visible light frequencies.
- Demonstrated cloaking for specific light polarizations.
Main Results:
- Successfully created a macroscopic volumetric invisibility cloak.
- The cloak can hide 3D objects at the centimeter and millimeter scales.
- The device operates effectively at visible frequencies.
Conclusions:
- This work presents a significant advancement in invisibility cloak technology.
- The use of natural crystals enables macroscopic cloaking, overcoming previous size constraints.
- Opens new possibilities for macroscopic cloaking devices and applications.
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