title: Single-pulse ultraviolet laser recording of periodically poled structures in polymer thin films.
abstract: A simple fabrication technique for nonlinear polymeric optical waveguide patterns is introduced based on the two-beam interference method. We determined that the second-order nonlinearity of poled polymer films is erased by single-pulse ultraviolet (UV) laser irradiation. The erasure mechanism for second-order nonlinearity is discussed. To form a periodic structure in an optical polymer waveguide, two types of optical configuration of two-beam interference were arranged, and a single-pulse UV laser was exposed directly onto poled films. We prove that this method provides a simple way to fabricate volume-type and ridge-type periodically poled structures, i.e., chi(2) gratings, from the submicrometer to the millimeter range.
authors: Faculty of Engineering, Shizuoka University, 3-5-1 Johoku, Hamamatsu 432-8561, Japan. tdosugi@eng.shizuoka.ac.jp
authors: O
authors: O
authors: Sugihara
authors: M
authors: M
authors: Nakanishi
authors: Y
authors: Y
authors: Che
authors: C
authors: C
authors: Egami
authors: Y
authors: Y
authors: Kawata
authors: N
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authors: Okamoto