| Autor: |
Sato, Heihachi, Matsuno, Hiroaki, Seo, Iwao |
| Zdroj: |
Journal of the Optical Society of America B: Optical Physics; February 1998, Vol. 15 Issue: 2 p773-780, 8p |
| Abstrakt: |
By irradiation of a UV source through a metallic mask with a chirped periodic or periodic structure and a metallic wire onto vinylidene cyanide/vinyl acetate copolymer, the ?erenkov-radiative second-harmonic generation has been efficiently enhanced, with the channel waveguide having a chirped periodic nonlinear optical susceptibility _χ^(2) corrugation. By use of an ArF 193-nm laser close to an inherent absorption line of the copolymer as the UV source, not only a nonlinear optical _χ^(2) corrugation with the average period ?_s0 = 20 μm and a chirping index ø_m ? 9 but also a channel guide 60 μm wide were induced. The enhancement factor of the ?erenkovian second-harmonic-generation power achieved was 7.4 times that of a uniform nonlinear optical _χ^(2) scheme. This simple UV irradiation method leads to almost the same effect as is obtained by a contact electrode method, showing its feasibility for the ?erenkovian second-harmonic-generation scheme. |
| Databáze: |
Supplemental Index |
| Externí odkaz: |
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