Multi-Quantum-Well and Superlattice Mercuric-Telluride/ Cadmium-Telluride Structures at High Hydrostatic Pressures

本研究的目的是促进对由碲化汞和碲化镉层制成的多量子阱和超晶格结构的基本性质和器件性质的理解。一个将测量金刚石砧细胞在高静水压力条件下的光吸收和光致发光。HgTe和CdTe在压力下的固有能带结构的变化已经被很好地理解，因此量子阱和超晶格的光学性质的巨大变化是可以预测的，结果将允许MQW和SL结构的理论预测和实验结果的关键对抗。MQW和SL HgTe/CdTe样品将由北卡罗莱纳州立大学的j.f. Schetzina教授提供。这些是最先进的分子束外延生长样品，在环境压力下进行结构，电学和光学测量。

The objective of this research is to advance the understanding of the fundamental and device properties of multi-quantum-well and superlattice structures fabricated from layers of mercury- telluride and cadmium-telluride. One will measure the optical absorption and photoluminescence under conditions of high hydrostatic pressure produced in diamond anvil cells. The changes in the intrinsic band structures of both HgTe and CdTe under pressure are well understood and thus large changes in the optical properties of the quantum wells and superlattices are anticipated and the results will permit a critical confrontation of theoretical predictions of the MQW and SL structures and the experimental results. The MQW and SL HgTe/CdTe samples will be provided by Prof. J. F. Schetzina of North Carolina State Univeristy. These are state-of-the-art molecular beam epitaxy grown samples which are well characterized by structural, electrical and optical measurements at ambient pressure.