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A Novel Approach to Negative Refraction

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CAMBRIDGE, Mass., Aug. 2, 2012 — An “extraordinarily strong” negative refractive index as large as -700 — more than 100 times larger than most previously reported — was achieved in metamaterials using a new technique developed by scientists at the Harvard School of Engineering and Applied Sciences (SEAS) in collaboration with Weizmann Institute of Science in Israel. In a vacuum, light travels so fast that it can circle the Earth more than seven times within the blink of an eye. When light propagates through matter, however, it slows by a factor typically less than 5. This factor, called the...Read full article

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    Published: August 2012
    Glossary
    optical tweezers
    Optical tweezers refer to a scientific instrument that uses the pressure of laser light to trap and manipulate microscopic objects, such as particles or biological cells, in three dimensions. This technique relies on the momentum transfer of photons from the laser beam to the trapped objects, creating a stable trapping potential. Optical tweezers are widely used in physics, biology, and nanotechnology for studying and manipulating tiny structures at the microscale and nanoscale levels. Key...
    photonics
    The technology of generating and harnessing light and other forms of radiant energy whose quantum unit is the photon. The science includes light emission, transmission, deflection, amplification and detection by optical components and instruments, lasers and other light sources, fiber optics, electro-optical instrumentation, related hardware and electronics, and sophisticated systems. The range of applications of photonics extends from energy generation to detection to communications and...
    refraction
    The bending of oblique incident rays as they pass from a medium having one refractive index into a medium with a different refractive index.
    2DEGaluminum gallium arsenideAmericasCommunicationsDonhee Hamelectromagnetic wavesFaraday’s lawgallium arsenideHarvard School of Engineering and Applied SciencesHarvard SEASHosang Yoonkinetic inductancemagnetic inductanceMassachusettsmetamaterialsMicroscopymicrowavesnegative refractive indexNewton’s law of motionoptical tweezersOpticsphotonicspropagationrefractionrefractive indexResearch & Technologytwo-dimensional electron gasVladimir UmanskyWeizmann Institute of Science

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