Influence of two-photon absorption on bistable switching in a silicon photonic crystal microcavity |
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| Authors: | Chao Li Jun-Fang Wu |
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| Affiliation: | a Laboratory of Photonic Information Technology, School for Information and Optoelectronic Science and Engineering, South China Normal University, Guangzhou 510006, China
b Department of Physics, School of Science, South China University of Technology, Guangzhou 510640, China |
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| Abstract: | By employing a simplified nonlinear coupled mode theory, we discuss the influence of two-photon absorption (TPA) on the characteristics of bistable switching. It is revealed that the critical value of frequency detuning for bistability rises linearly with increasing TPA coefficient k (when k is less than 30), and eventually access to a saturated value. It is also found that TPA effect will be enhanced for a greater frequency detuning, especially when transmission reaches its peak value. As a result, the peak transmission will decrease monotonously with the increasing frequency detuning. Based on this simplified model, the TPA-induced temperature rise in microcavity is also estimated. The theoretical predictions show good agreement with the simultaneous results, as well as the proposed experimental phenomena. |
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| Keywords: | Photonic crystal Bistable switching Two-photon absorption Coupled mode theory |
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