InGaAs-GaAs短周期应变层超晶格调制反射光谱中的Franz-Keldysh振荡

在p-i-n结构的 InGaAs-GaAs应变层短周期超晶格的调制光反射谱中观察并确认了超晶格微带电子的Franz-Keldysh振荡, 通过对Franz-Keldysh振荡的分析,推算出超晶格区内建电场大小;讨论了内建电场对超晶格微带电子的影响,最后指出Franz-Keldysh振荡可以作为检验短周期超晶格样品质量的一种手段。

MBE生长的PM-HEMT结构中深电子陷阱及其钝化/消除

于2010-11-23批量导入

MOCVD生长的平面型InGaAs/InP PIN光电探测器件

讨论了采了MOCVD技术生长的平面型InGaAs／InP PIN器件的光学特性及制备工艺。通过引入InP窗口层并制备合适的抗反射膜, 提高了器件的量子效率, 达到～90％, 采用平面型结构有可能改善器件的稳定性和可靠性。图3参5

InGaAs/InP体材料和量了阱、超晶格材料的低压MOCVD生长及材料特性的测试分析

于2010-11-23批量导入

InGaAs/GaAs应变层短周期超晶格的Wannier-Stark效应

于2010-11-23批量导入

低压MOCVD生长的InGaAs/InP量子阱的光致发光谱线线宽及量子尺寸效应的测量分析

于2010-11-23批量导入

低阈值InGaAs-GaAs应变层多量子阱激光器

于2010-11-23批量导入

合金无序和界面不平整对InGaAs/GaAs应变量子阱光谱展宽的影响

于2010-11-23批量导入

Optimization of InGaAs quantum dots for optoelectronic applications

Quantum dot infrared photodetectors (QDIP) are in the center of research interest nowadays. However the real QDIP is inferior to those predicted in theory, in which the dot density is much higher than those reported. Through optimizing the growth conditions, we realized the control of high-density quantum dot growth. This will be very useful for future QDIP development.

Growth and fabrication of high performance 980nm strained InGaAs quantum well lasers using novel hybrid material system of InGaAsP and AlGaAs

In this paper, we report on the design, growth and fabrication of 980nm strained InGaAs quantum well lasers employing novel material system of Al-free active region and AlGaAs cladding layers. The use of AlGaAs cladding instead of InGaP provides potential advantages in laser structure design, improvement of surface morphology and laser performance. We demonstrate an optimized broad-waveguide structure for obtaining high power 980nm quantum well lasers with low vertical beam divergence. The laser structure was grown by low-pressure metalorganic chemical vapor deposition, which exhibit a high internal quantum efficiency of similar to 90% and a low internal loss of 1.5-2.5 cm(-1). The broad-area and ridge-waveguide laser devices are both fabricated. For 100 mu m wide stripe lasers with cavity length of 800 mu m, a low threshold current of 170mA, a high slope efficiency of 1.0W/A and high output power of more than 3.5W are achieved. The temperature dependences of the threshold current and the emitting spectra demonstrate a very high characteristic temperature coefficient (T-o) of 200-250K and a wavelength shift coefficient of 0.34nm/degrees C. For 4 mu m-width ridge waveguide structure laser devices, a maximum output power of 340mW with GOD-free thermal roll-over characteristics is obtained.