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Polarization insensitive self-collimation waveguide in square lattice annular photonic crystals |
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| Authors: | Jin Hou Huaming Wu |
| Affiliation: | a Wuhan National Laboratory for Optoelectronics, College of Optoelectronic Science and Engineering, Huazhong University of Science and Technology, Wuhan, Hubei 430074, China b State Key Laboratory on Advanced Optical Communication Systems and Networks, Peking University, Beijing 100871, China c School of Electrical and Computer Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332, USA |
| Abstract: | The frequency bands for self-collimation at both TE and TM polarizations in square lattice annular photonic crystals are studied systematically by plane-wave expansion and finite difference time domain methods. By increasing the inner ring radius or reducing the outer ring radius, the self-collimation band will be moved to a lower frequency. Compared with the TM modes, TE ones have different frequency sensitivities to both the inner ring radius and outer ring radius tuning. Using these features, a polarization insensitive self-collimation waveguide in a high dielectric contrast system with bandwidth up to 102.9 nm is demonstrated as an example of the implementation of photonic integration circuits. |
| Keywords: | Photonic crystals Self-collimation Beam waveguides Polarization insensitive |
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