==> [email protected] (why520 628) 提到: > 看paper时 看到一句 > it should guarantee the absence of any higher order Bragg reflections for any > angle of incidence. > 我有听过Bragg reflections 查过 但是看不太懂 > 还有这个高阶是什麽意思 反射还有高低阶之分吗 > 有人可以用比较浅显的话跟我说明吗 > 感恩 yes, if a travelling light wave is incidenting to the surface of a medium with a spatially periodic refractive index disribution (e.g. a grating). Due to phase matching condition (in physics, it is a momentum consevation among the incident light, reflected light and the grating period), you can measure reflected light at different angles and intensities. In terms of Bragg regime, we can say the reflected light operates in different orders. -- ☆ [Origin:椰林风情] [From: fiber7.ee.nthu.edu.tw] [Login: **] [Post: 13]