Re: [問題] higher order Bragg reflections
==> why628.bbs@ptt.cc (why520 628) 提到:
> 看paper時 看到一句
> it should guarantee the absence of any higher order Bragg reflections for any
> angle of incidence.
> 我有聽過Bragg reflections 查過 但是看不太懂
> 還有這個高階是什麼意思 反射還有高低階之分嗎
> 有人可以用比較淺顯的話跟我說明嗎
> 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.
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☆ [Origin:椰林風情] [From: fiber7.ee.nthu.edu.tw] [Login: **] [Post: 13]
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