Sensitive photonic crystal phase logic gates

Abstract

Total optical phase logic gates are reported in this paper. They are constructed by coupled-defect photonic crystal after two problems are overcome by a heterostructure or an asymmetric structure. Both half and all-phase logic gates are discussed. The sensitivity of these total optical phase logic gates not only are two orders sensitive than those using amplitude-signal, but also have many other advantages: such as very low energy cost. By using such phase logic gates, only a continued wave laser with one frequency is sufficient to operate the phase logic gate or the whole optical integrated circuit.

Keywords:

• photonic crystal
• phase logic gates
• all-optical signal processing and computing
• optical communication
• all-optical computer

Acknowledgements

This work is supported by the National Natural Science Foundation of China (10674183), National 973 Project of China (2004CB719804), National Science Fund for Distinguished Young Scholars (No. 60525213), NSFC Guangdong Joint Fund (U0735001), and National Key Technology R&D Program of China (No. 2007BAH13B01).