Yanik Mehmet Fatih, Fan Shanhui, Soljacić Marin, Joannopoulos J D
Ginzton Laboratory, Stanford University, Stanford, California 94304, USA.
Opt Lett. 2003 Dec 15;28(24):2506-8. doi: 10.1364/ol.28.002506.
We demonstrate all-optical switching action in a nonlinear photonic crystal cross-waveguide geometry with instantaneous Kerr nonlinearity, in which the transmission of a signal can be reversibly switched on and off by a control input. Our geometry accomplishes both spatial and spectral separation between the signal and the control in the nonlinear regime. The device occupies a small footprint of a few micrometers squared and requires only a few milliwatts of power at a 10-Gbit/s switching rate by use of Kerr nonlinearity in AlGaAs below half the electronic bandgap. We also show that the switching dynamics, as revealed by both coupled-mode theory and finite-difference time domain simulations, exhibits collective behavior that can be exploited to generate high-contrast logic levels and all-optical memory.
我们在具有瞬时克尔非线性的非线性光子晶体交叉波导结构中展示了全光开关行为，其中信号的传输可以通过控制输入进行可逆的开启和关闭。我们的结构在非线性区域实现了信号与控制之间的空间和光谱分离。该器件占地面积仅几平方微米，通过利用电子带隙以下的AlGaAs中的克尔非线性，在10 Gbit/s的开关速率下仅需几毫瓦的功率。我们还表明，由耦合模理论和时域有限差分模拟揭示的开关动力学表现出集体行为，可用于产生高对比度逻辑电平及全光存储器。
