Mizutani Akio, Kikuta Hisao, Iwata Koichi
Osaka Science and Technology Center, Izumi, Osaka 594-1157, Japan.
J Opt Soc Am A Opt Image Sci Vis. 2005 Feb;22(2):355-60. doi: 10.1364/josaa.22.000355.
Optical switching effects of a guided-mode resonant grating (GMRG) with a Kerr medium have been simulated with the nonlinear finite differential time domain (FDTD) method. An asymmetric waveguide grating with a large second spatial harmonic component has been proposed for the optical switch. Resonant reflection occurs at both of the band-edge wavelengths. These wavelengths are used for the pump light and the probe light. The enhanced electric field of the pump light changes the resonant wavelength for the probe light as a result of the Kerr effect. We designed the GMRG with resonant wavelengths of 1489.6 and 1630 nm, which were used for the pump light and the probe light, respectively. When the grating material has a third-order susceptibility chi(3) of 8.5 x 10(-10) esu, the transmittance of the probe light changes from 0 to 80% by increasing the intensity of the pump light from 0 to 60 kW/mm2.
利用非线性时域有限差分（FDTD）方法模拟了具有克尔介质的导模共振光栅（GMRG）的光开关效应。提出了一种具有大二次空间谐波分量的非对称波导光栅用于光开关。在两个带边波长处均发生共振反射。这些波长分别用于泵浦光和探测光。由于克尔效应，泵浦光增强的电场改变了探测光的共振波长。我们设计的GMRG的共振波长分别为1489.6和1630 nm，分别用于泵浦光和探测光。当光栅材料的三阶极化率χ(3)为8.5×10^(-10) esu时，通过将泵浦光强度从0增加到60 kW/mm²，探测光的透过率从0变为80%。
