A tunable power splitter based on modes coupling and self-collimation effect in two-dimensional photonic crystals |
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| Authors: | Yifeng Shen Yongchun Wang Fangfang Wu Lulu Li Jie Zhou Yuan Zhang Changqing Guo |
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| Affiliation: | 1. Department of Physics, China University of Mining and Technology, Xuzhou 221116, China;2. Surface Physics Laboratory (National Key Lab), Fudan University, Shanghai 200433, China;1. School of Materials Science and Engineering, Harbin Institution of Technology, Harbin, 150001, China;2. Department of Physics, Harbin Institute of Technology, Harbin, 150001, China;3. Institute of Telecommunication Satellite, China Academy of Space Technology, Beijing, 10094, China;1. Kurnakov Institute of General and Inorganic Chemistry, RAS, Moscow 119991, Russia;2. National Research Tomsk State University, Tomsk 634050, Russia;3. National Research University of Electronic Technology, Zelenograd 124498, Russia;4. Ryazan State Radio Engineering University, Ryazan 390005, Russia;5. Mendeleev University of Chemical Technology of Russia, Moscow 125047, Russia;6. Lebedev Physical Institute, RAS, Moscow 119991, Russia |
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| Abstract: | A tunable power splitter is proposed in a two-dimensional photonic crystal with a line defect composed of two rows rods, whose refractive index can be controlled artificially. This device is working at a self-collimation frequency. The finite difference time domain (FDTD) simulations show that the beam splitting ratio is a function of the refractive index of line defect. If the index varies from 3.0 to 3.5, the beam intensity of one output port decreases from 87.2% (normalized by the input beam) to 0 while the intensity of the other output port increases from 8.98% to 100% monotonically. The coupling between the self-collimation mode and the defect mode is used to explain the working mechanism. |
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