One-dimensional continuum and exciton states in quantum wires
One-dimensional continuum and exciton states in quantum wires
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DOI：
10.1063/1.1539552
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发表时间：
2002-09
影响因子：
4
通讯作者：
H. Akiyama;L. Pfeiffer;M. Yoshita;A. Pinczuk;K. West
中科院分区：
文献类型：
--
作者：
H. Akiyama;L. Pfeiffer;M. Yoshita;A. Pinczuk;K. West
采用劈边过生长技术，在生长中断高温退火改善的界面上进行分子束外延，制备出高质量的T形量子线。通过在5 K下的微光致发光（PL）和PL激发（PLE）光谱的表征揭示了高均匀性，尖锐的光谱宽度和一维（1D）激子的小斯托克斯位移。1D态的PLE谱显示出基态激子的大峰值和归因于1D连续态的小吸收带，其起始于激子峰值以上11毫电子伏。
High-quality T-shaped quantum wires are fabricated by cleaved-edge overgrowth with molecular-beam epitaxy on the interface improved by a growth-interrupt high-temperature anneal. Characterization by micro-photoluminescence (PL) and PL excitation (PLE) spectroscopy at 5 K reveals high uniformity, a sharp spectral width, and a small Stokes shift of one-dimensional (1D) excitons. The PLE spectrum for 1D states shows a large peak of ground-state excitons and a small absorption band ascribed to 1D continuum states with an onset at 11 meV above the exciton peak.