采用LP-MOVPE技术,在(001)InP衬底上生长的InAs /InP自组装量子点是无序的.为了解决这个问题,在InP衬底上先生长张应变的GaAs层,然后再生长InAs层,可得到有序化排列的量子点.本文对张应变GaAs层引入使量子点有序化排列的机理进行了分析.为生长有序化、高密度、均匀性好自组装量子点提供了依据.
In the paper we analyze the mechanism of ordering growth InAs/InP quantum dots(islands) on undulational surface and point out that the tensile strain layer controls the arrangement of InAs/InP self-assembled quantum dots. Ordering InAs quantum dot on tensile strained GaAs layer on InP substrate is achieved.
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