Micromechanical Tunable Optical Filter

A micromachined vertical cavity tunable filter with AlGaAs/GaAs distributed Bragg reflector is presented. This filter can be electrostatic tuning over a range of 28nm with an applied voltage of 7V.

一种具有平顶陡边响应的新型谐振腔增强型（RCE）光电探测器的理论分析及模拟

提出了一种适用于波分复用系统的具有平顶陡边响应的新型谐振腔强型（RCE）光电探测器结构，模拟得到了量子效率从峰值下降0.5dB的线宽1.8 nm，10 dB的线宽5.6 nm，20 dB的线宽10.4 nm，量子效率峰值99.7%，几乎没有凹陷的响应曲线。

生长停顿对量子点激光器的影响

在InAs自组织量子点的GaAs覆盖层中引入生长停顿，将这种量子点结构作激光器的有源区，与不引入生长停顿的量子点激光器进行对比后发现

新型DVD/VCD光学头用PDIC的研制

于2010-11-23批量导入

Observation of defects in GaN epilayers

GaN epilayers grown on sapphire substrates nitridated for various lengthy periods were investigated by light scattering tomography (LST) and Raman scattering. In the LST images of the plane-view epilayers, the light scattering defects distribute in [<11(2)over bar 0>] directions. The defect density is lower in epilayer grown on substrate nitridated for a longer period. The defects are believed to be straight threading edge dislocations on {<1(1)over bar 00>} planes. The Raman shift of E-2 mode is larger in the sample grown on substrate nitridated for a longer period. Our results show that the stress is higher in the sample with fewer dislocations.