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篇目详细内容 |
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【篇名】 |
Ultrafast optical switching in Kerr nonlinear photonic crystals |
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【刊名】 |
Frontiers of Physics in China |
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【刊名缩写】 |
Front. Phys. China |
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【ISSN】 |
1673-3487 |
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【EISSN】 |
1673-3606 |
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【DOI】 |
10.1007/s11467-010-0100-0 |
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【出版社】 |
Higher Education Press and Springer-Verlag Berlin
Heidelberg |
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【出版年】 |
2010 |
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【卷期】 |
5
卷3期 |
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【页码】 |
220-244
页,共
25
页 |
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【作者】 |
Ye LIU(刘晔);
Fei QIN(秦飞);
Fei ZHOU(周飞);
Qing-bo MENG(孟庆波);
Dao-zhong ZHANG (张道中);
Zhi-yuan
LI (李志远);
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【关键词】 |
nonlinear photonic crystal; all-optical switching; Kerr nonlinearity; femtosecond pump–probe technique; photonic crystal cavities |
【摘要】 |
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Nonlinear photonic crystals made from polystyrene materials that have Kerr nonlinearity can exhibit ultrafast optical switching when the samples are pumped by ultrashort optical pulses with high intensity due to the change of the refractive index of polystyrene and subsequent shift of the band gap edge or defect state resonant frequency. Polystyrene has a large Kerr nonlinear susceptibility and almost instantaneous response to pump light, making it suitable for the realization of ultrafast optical switching with a response time as short as a few femtoseconds. In this paper, we review our experimental progress on the continual improvement of all-optical switching speed in two-dimensional and three-dimensional polystyrene nonlinear photonic crystals in the past years. Several relevant issues are discussed and analyzed, including different mechanisms for all-optical switching, preparation of nonlinear photonic crystal samples by means of microfabrication and self-assembly techniques, characterization of optical switching performance by means of femtosecond pump-probe technique, and different ways to lower the pump power of optical switching to facilitate practical applications in optical information processing. Finally, a brief summary and a perspective of future work are provided. |
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