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Effect of Gold Nano Particles on the Formation of Surface Relief Gratings on Azo Polymer Films
오차환,나성관,김정성 한국물리학회 2008 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.53 No.4
A surface relief grating (SRG) can be formed by illuminating an azo polymer film with two interfering beams. The SRG is applicable to diffractive optical elements, to anchoring of a liquid crystal, and recently to photonic crystal fabrication. In this research, we investigated the effect of gold nano particles on the formation of SRGs on two kinds of azo polymer films. The SRGs were formed by using the two-beam interference technique, and the shapes and the heights of the SRGs at various contents of gold nano particles were measured and compared by using atomic force microscopy. The characteristics of the SRGs were analyzed and are discussed in terms of the content of gold nano particles, the viscosity, and the absorption spectrum of the azo polymer.