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The photocurrent (PC) spectroscopy of the GaAs/AlAs and GaAs/ AlGaAs superlattices (SLs) are studied by using a P-i-N photodiode structure in which the intrinsic regions are composed of SLs. The measurements were made at different temperatures ranging from 15K to 300K and with the application of transverse dc electric field. A sequence of exciton absorption peaks were observed and assigned according to the theoretical predictions based on the Kronig-Penney model calculations of sublevel energies in the coupled multiple quantum wells (MQWs). The SL structure parameters were checked by both the absolute peak positions and the heavy and light hole splittings. The quantum confined Stark effect of excitonic transitions in MQWs which is closely dependent on the barrier and well layer thicknesses was studied. The assignment of some forbidden transitions was proved by different ways. The PC spectroscopy was also measured by the excitation of linear polarized light in a side illumination mode.The anisotropic effect showed distinct features related to heavy and light holes, respectively. 相似文献
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特种设备安装质量是保证特种设备安全运行的有力保证,而特种设备安装单位的质量保证体系的完整性和运转是否正常,是保证特种设备安装质量的前提,文章通过对现阶段特种设备安装单位质量管理现状及证后监管方式的探讨,提出相应的对策和建议供管理部门参考。 相似文献
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与CMOS工艺兼容的硅高速光电探测器模拟与设计 总被引:11,自引:9,他引:2
用器件模拟的方法,设计了一种与常规CMOS 工艺兼容的硅高速光电探测器,该探测器可与CMOS接收机电路单片集成,对该探测器进行了器件模拟研究,给出了该探测器的电路模型.通过MOSIS(MOS implementation support project) 0.35μm COMS工艺制做了该探测器,实际测试了该器件的频率响应和波长响应,探测器频率响应在1GHz以上,峰值波长响应在0.69μm. 相似文献
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