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Infiltrated Crystal Offers Tunable Bandgap

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Richard Gaughan

Researchers in Katsumi Yoshino's group at Osaka University in Suita, Japan, have demonstrated photonic bandgap tunability in synthetic opal infiltrated with liquid crystal. They also have produced a tunable inverse opal, promising applications in low-threshold tunable lasers, prisms and polarizers. The application of a voltage to nematic liquid crystal in the voids of synthetic opal enables electrical tuning of the structure's photonic bandgap. Courtesy of Osaka University. The researchers constructed the thin-film opal by introducing a suspension of 300-nm-diameter silica spheres between...Read full article

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    Published: February 2002
    Research & TechnologyspectroscopyTech Pulse

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