Two-dimensional microsphere quasi-crystal: fabrication and properties

Natalia E. Noginova; Putcha Venkateswarlu; Nickolai V. Kukhtarev; Sergey S. Sarkisov; Mikhail A. Noginov; H. John Caulfield; Michael J. Curley

doi:10.1117/12.258137

Abstract

2D quasi-crystals were fabricated from polystyrene microspheres and characterized for their structural, diffraction, and non-linear optics properties. The quasi- crystals were produced with the method based on Langmuir- Blodgett thin film technique. Illuminating the crystal with the laser beam, we observed the diffraction pattern in the direction of the beam propagation and in the direction of the back scattering, similar to the x-ray Laue pattern observed in regular crystals with hexagonal structure. The absorption spectrum of the quasi-crystal demonstrated two series of regular maxima and minima, with the spacing inversely proportional to the microspheres diameter. Illumination of the dye-doped microspheres crystal with Q- switched radiation of Nd:YAG laser showed the enhancement of non-linear properties, in particular, second harmonic generation.

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Natalia E. Noginova, Natalia E. Noginova, Putcha Venkateswarlu, Putcha Venkateswarlu, Nickolai V. Kukhtarev, Nickolai V. Kukhtarev, Sergey S. Sarkisov, Sergey S. Sarkisov, Mikhail A. Noginov, Mikhail A. Noginov, H. John Caulfield, H. John Caulfield, Michael J. Curley, Michael J. Curley, } "Two-dimensional microsphere quasi-crystal: fabrication and properties", Proc. SPIE 2824, Adaptive Computing: Mathematical and Physical Methods for Complex Environments, (11 November 1996); doi: 10.1117/12.258137; https://doi.org/10.1117/12.258137

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