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A New Way To Trap Light

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CAMBRIDGE, Mass., July 12, 2013 — There are several methods to confine light, but a new approach uses two waves of the same wavelength, but exactly opposite phases, to cancel each other out, allowing light of other wavelengths to pass freely. Beams of light are usually trapped with traditional or advanced dielectric mirrors, as well as exotic photonic crystals and devices that rely on a phenomenon called Anderson localization. These methods are used to build optical devices such as lasers, solar cells and fiber optics. In all of these cases, light’s passage is blocked; in physics terminology, there are no...Read full article

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    Published: July 2013
    Glossary
    destructive interference
    The interaction of superimposed light from two separate sources that results in a combined intensity that is less than the sum of their individual intensities before they were superimposed.
    photonic crystals
    Photonic crystals are artificial structures or materials designed to manipulate and control the flow of light in a manner analogous to how semiconductors control the flow of electrons. Photonic crystals are often engineered to have periodic variations in their refractive index, leading to bandgaps that prevent certain wavelengths of light from propagating through the material. These bandgaps are similar in principle to electronic bandgaps in semiconductors. Here are some key points about...
    AmericasBasic ScienceBo ZhenChia Wei Hsudestructive interferenceembedded eigenvalueenergyJeongwon LeeJohn JoannopoulosJohn von Neumannlight confinementlight trapsMarin SoljacicMassachusettsmirrorsMIToptical mirrorsOpticsphotonic crystalsResearch & TechnologySensors & DetectorsSong-Liang ChuaSteven Johnson

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