Suzuki Keijiro, Baba Toshihiko
Department of Electrical and Computer Engineering, Yokohama National University, 79-5 Tokiwadai, Hodogaya-ku, Yokohama 240-8501, Japan.
Opt Express. 2010 Dec 6;18(25):26675-85. doi: 10.1364/OE.18.026675.
Optical nonlinearity can be enhanced by the combination of highly nonlinear chalcogenide glass and photonic crystal waveguides (PCWs) providing strong optical confinement and slow-light effects. In a Ag-As(2)Se(3) chalcogenide PCW, the effective nonlinear parameter γeff reaches 6.3 × 10(4) W(-1)m(-1), which is 200 times larger than that in Si photonic wire waveguides. In this paper, we report the detailed design, fabrication process, and the linear and nonlinear characteristics of this waveguide at silica fiber communication wavelengths. We show that the waveguide exhibits negligible two-photon absorption, and also high-efficiency self-phase modulation and four-wave mixing, which are assisted by low-dispersion slow light.
通过将高非线性硫系玻璃与光子晶体波导（PCW）相结合，可以增强光学非线性，光子晶体波导能提供强光学限制和慢光效应。在一种Ag-As₂Se₃硫系光子晶体波导中，有效非线性参数γeff达到6.3×10⁴W⁻¹m⁻¹，这比硅光子线波导中的该参数大200倍。在本文中，我们报告了这种波导在石英光纤通信波长下的详细设计、制造工艺以及线性和非线性特性。我们表明，该波导的双光子吸收可忽略不计，并且在低色散慢光的辅助下还具有高效的自相位调制和四波混频。
