|
|||||
|
|
Refractive index‐modulated grating in two‐mode planar polymeric waveguide produced by two‐photon polymerization |
|
| Authors: | Yi Dong Xiaoqiang Yu Yuming Sun Xueyuan Hou Yufei Li Xian Zhang |
| Institution: | 1. Department of Optics, Shandong University, Jinan, 250100 P. R. China;2. State Key Laboratory of Crystal Materials, Shandong University, Jinan, 250100 P. R. China;3. State Key Laboratory of Crystal Materials, Shandong University, Jinan, 250100 P. R. ChinaState Key Laboratory of Crystal Materials, Shandong University, Jinan, 250100, P. R. China. |
| Abstract: | A polymeric waveguide film was manufactured by spinning the materials on quartz substrate. Two‐photon‐initiated photopolymerization was carried out by tight‐focusing femtosecond laser pulses in the two‐mode planar waveguide. A typical index‐modulated grating of 2.5 × 2 mm areas without morphology was fabricated. The results show that peak‐to‐peak modulation depth of the surface profile of grating region was only about 7 nm. The diffraction efficiency (DE) of the grating with a spacing period 2 µm was 0.17% and the corresponding index modulation reached 5.7 × 10?3. Copyright © 2007 John Wiley & Sons, Ltd. |
| Keywords: | polymeric waveguide two‐photon‐initiated polymerization index gratings surface structure |