Polarization-selective photonic band gap induced by electromagnetically induced transparency |
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| Authors: | Ping Liao Bin Luo Wanyi Gu Hong Guo |
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| Affiliation: | 1. State Key Laboratory of Information Photonics and Optical Communications , Beijing University of Posts and Telecommunications , Beijing 100876 , People's Republic of China;2. School of Electronics Engineering and Computer Science , CREAM Group, State Key Laboratory of Advanced Optical Communication Systems and Networks (Peking University) and Institute of Quantum Electronics, Peking University , Beijing 100871 , People's Republic of China |
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| Abstract: | A tripod-type system driven by a weak linearly polarized probe light and a π-polarized standing-wave control light is studied. The results show that double photonic band gaps (PBGs) can be obtained at two different frequencies due to Zeeman splitting induced by an external magnetic field. This allows us to selectively manipulate the σ± components of the probe light, which exhibits polarization selective features. These peculiar features can be employed to devise schemes for a polarization beam splitter and polarization selective routing. Furthermore, the dependence of the gap position on the magnetic field provides an additional control of the PBGs structure. Thus, double tunable PBGs can be achieved. |
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| Keywords: | electromagnetically induced transparency photonic band gap polarization |
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