Momentum-space polarization fields in two-dimensional photonic-crystal slabs: Physics and applications |
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| Institution: | 1. Department of Physics, The Hong Kong University of Science and Technology, Hong Kong 999077, China;2. State Key Laboratory of Surface Physics, Key Laboratory of Micro- and Nano-Photonic Structures (Ministry of Education), and Department of Physics, Fudan University, Shanghai 200433, China;3. Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing 210093, China |
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| Abstract: | In addition to non-radiative guided modes, two-dimensional photonic-crystal slabs support guided resonant ones which can radiate into free space. From the polarization states of these guided resonances, a polarization field on a photonic band can be constructed in momentum space. Momentum-space polarization fields display complicated configurations and patterns with different types of polarization singularities inside, shedding new light on the manipulations of light flows. In this review, we summarize the recent research progress on momentum-space polarization fields and singularities in two-dimensional photonic-crystal slabs, focusing on their unique optical properties and potential applications as well. |
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| Keywords: | photonic crystal polarization field polarization singularity |
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