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Superparamagnetic Nanoclusters Form Photonic Crystals

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Crystal structure and diffraction are controlled by magnetic field.

Lauren I. Rugani

Photonic crystals hold promise in optoelectronic applications that require the manipulation of photons, as in telecommunication devices and sensors. Although a desirable photonic crystal will have a tunable stop band controllable by external stimuli, most devices are limited by small tunability, slow response to external stimuli or difficult integration into an existing photonic system. A TEM image shows the colloidal nanoclusters, made up of smaller magnetite particles. Scale bar 100 nm. Images reprinted with permission of Angewandte Chemie. Now, researchers at the University of...Read full article

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    Published: September 2007
    Glossary
    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...
    CommunicationsConsumeroptoelectronic applicationsphotonic crystalsResearch & TechnologySensors & DetectorsspectroscopyTech Pulsetelecommunication devices

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