有谁了解砷化镓(GaAS)的特性，要给它镀膜要注意些什么问题？

jeh

有谁了解砷化镓(GaAS)的特性，要给它镀高反膜要注意些什么问题？

pitcher

What do you want to know about it? I am also looking for the high reflection coating for GaAs or GaSb based laser diode. I know GaAs well, but little about the coating. The reflective index of GaAs is around 3.8. I think that’’s critical to the film design of coating.

chugqchugq

中心波长是多少？

jeh

中心波长1550nm，要求R98%，我试镀过，用sio2和ta2o5，第一层为ta2o5，烘烤加热230℃，还有赫尔源辅助镀膜，但膜层不牢，脱膜！！

optele

as i know the index of GaAs is about 3.5

xiao2000

Refractive index n versus photon energy for a high-purity GaAs.(n_o~5·10¹³ cm^-3). Solid curve is deduced from two-beam reflectance measurements at 279 K. Dark circles are obtained from refraction measurements. Light circles are calculated from Kramers-Kronig analysis

[此贴子已经被作者于2004-4-2 9:22:37编辑过]

vietti

对半导体激光器膜系计算，应该是从材料往空气入射吧，

即N0=3.5，Ns＝1，对吗？