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15 October 2015 Fabrication and optical transmission characteristics of polymers woodpile photonic crystal structures with different crystal planes
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Proceedings Volume 9671, AOPC 2015: Advances in Laser Technology and Applications; 967127 (2015) https://doi.org/10.1117/12.2203191
Event: Applied Optics and Photonics China (AOPC2015), 2015, Beijing, China
Abstract
The photonic band gap effect which originates from the translational invariance of the periodic lattice of dielectrics has been widely applied in the technical applications of microwave, telecommunication and visible wavelengths. Among the various examples, polymers based three dimensional (3D) photonic crystals (PhCs) have attracted considerable interest because they can be easily fabricated by femo-second (fs) ultrafast laser direct writing (DLW) method. However, it is difficult to realize complete band gap in polymers PhCs due to the low index contrast between polymers and air. Here, we report the design and experimental realization of light's nonreciprocal propagation in woodpile PhCs fabricated with DLW method. Firstly, we fabricated several polymers woodpile PhCs on glass substrate with different crystal planes. The Fourier transform infrared spectroscopy (FTIR) measurements are in agreement with the theoretical predictions, which proves the validity and the accuracy of our DLW method. Further measurements of the transmission spectra with respect to the incident angle reveal that the surface crystal planes and incident wave vectors play important roles in the optical response. Furthermore, we designed and fabricated a 30° PhC wedge. And we find nonreciprocal transmission effect between the forward and backward waves, resulting from the nonsymmetrical refraction of the light in different planes. Our results may find potential applications in future 3D photonic integrated circuits and pave the way for the fabrication of other photonic and optical devices with DLW method.
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Ling-Jing Chen, Xian-Zi Dong, Yuan-Yuan Zhao, Yong-Liang Zhang, Jie Liu, Mei-Ling Zheng, Xuan-Ming Duan, and Zhen-Sheng Zhao "Fabrication and optical transmission characteristics of polymers woodpile photonic crystal structures with different crystal planes", Proc. SPIE 9671, AOPC 2015: Advances in Laser Technology and Applications, 967127 (15 October 2015); https://doi.org/10.1117/12.2203191
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