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15 September 2004 Ultrafast Bragg switching induced by a phase transition in a 3D photonic crystal
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We demonstrate ultrafast shifting of a photonic stop band driven by a photoinduced phase transition in vanadium dioxide (VO2) forming a three-dimensional photonic crystal. An ultrashort 120-fs laser pulse induces a phase transition in VO2 filling the pores of an artificial silica opal, thus changing the effective dielectric constant of the opal. Consequently, the spectral position of the photonic stop band blue-shifts producing large changes in the reflectivity. The observed switching of the photonic crystal is faster that 350 fs. The demonstrated properties of opal-VO2 composite are relevant for potential applications in all-optical switches, optical memories, low-threshold lasers, and optical computers.
© (2004) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Dmitry A. Mazurenko, Andrey V. Akimov, Valery G. Golubev, Alexander A. Kaplyanskii, Dmitry A. Kurdyukov, Alexander B. Pevtsov, Robert Kerst, and Jaap I. Dijkhuis "Ultrafast Bragg switching induced by a phase transition in a 3D photonic crystal", Proc. SPIE 5450, Photonic Crystal Materials and Nanostructures, (15 September 2004);

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