Preparation method for bismuth-based non-rectangular group III-V semiconductor quantum well

Abstract

The invention relates to a preparation method for a bismuth-based non-rectangular group III-V semiconductor quantum well. The preparation method comprises the step of growing a potential well material and a potential barrier material of a group III-V semiconductor quantum well, wherein bismuth is added in the growth processes of both the potential well material and the potential barrier material. According to the preparation method, bismuth beam source shutters are opened simultaneously in the processes of growing the potential well material and the potential barrier material of the quantum well, and a non-rectangular quantum well structure is realized by utilizing the group III element interdiffusion caused by the bismuth. By the method, material components can be controlled effectively; the problem that the conventional growth method is only suitable for growing a rectangular quantum well structure with component mutations is solved; greater freedom is introduced to the design and the implementation of the structure and the functional of quantum; the preparation method disclosed by the invention is suitable for adopting a plurality of material growth means, such as molecular beam epitaxy and atomic layer deposition; and the operation process is simple and convenient.

Description

technical field [0001] The invention belongs to the field of preparation of semiconductor microstructure materials, in particular to a preparation method of bismuth-based non-rectangular III-V group semiconductor quantum wells. Background technique [0002] With the development of thin-film material epitaxy methods and semiconductor physics knowledge, quantum microstructures have been successfully prepared experimentally, which has promoted the rapid development of optoelectronic and electronic devices such as semiconductor lasers and semiconductor detectors. These devices have been widely used in different fields, and have played an important role in people's in-depth understanding and development of various quantum theories. Development of thin-layer epitaxy methods. At present, the quantum structure used is mainly based on heterogeneous materials. For example, people have developed a typical AlGaAs / GaAs system quantum structure with AlGaAs on the GaAs substrate as a pote...

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Problems solved by technology

With the deepening of research, this rectangular quantum structure also brings some restrictions. For example, in addition to the material composition, the variable parameter of the rectangular quantum structure is the width of the potential well and barrier, so the design requirements for some special functions often cannot Satisfied; another example: for the material system using lattice mismatch, the rectangular quantum structure with sudden composition often causes a large strain accumulation, which limits the scope of material design and growth on the one hand, and is not conducive to high quality on the other hand. material growth

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