15 September 2004 Application of pressure to shift the bandgap in polystyrene-based photonic crystals
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We describe a simple technique for the selective area modification of the bandgap in planar 3-D photonic crystals (PhC). The PhCs are grown by controlled drying of monosized polystyrene spheres. Uniaxial pressure of 41 MPa can produce a shift in the bandgap of ~90 nm from 230 nm spheres. An unexpected broadening of the bandgap is attributed to the change in topology associated with large necks formed between spheres at pressures greater than 10 MPa.
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Nigel P. Johnson, Ali Z. Khokhar, Martyn A. McLachlan, David W. McComb, Richard M. De La Rue, "Application of pressure to shift the bandgap in polystyrene-based photonic crystals", Proc. SPIE 5450, Photonic Crystal Materials and Nanostructures, (15 September 2004); doi: 10.1117/12.546533; https://doi.org/10.1117/12.546533


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