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半导体纳米晶体的能量转移送使用一个表轴量子井

Marc Achermann¹, Melissa A Petruska, Simon Kos

¹Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA.

|June 11, 2004

概括

半导体纳米晶体提供可调节的光辐射. 研究人员开发了一种通过能量转移间接电的方法,使纳米晶体激光器和放大器成为可能.

科学领域:

材料科学材料科学材料科学
纳米技术纳米技术
量子物理学量子物理学是一种量子物理学.

背景情况:

半导体纳米晶体表现出尺寸依赖的辐射颜色.
它们的光谱调性,高量子产量和光稳定性是发光技术的理想选择.
一个关键的挑战是通过隔热盖层实现电气送.

研究的目的:

为了证明纳米晶体的间接电.
为了克服绝缘封装层所带来的局限性.
探索基于纳米晶体的激光和放大器的潜力.

主要方法:

从近接量子井到纳米晶体的非接触,非辐射能量转移.
通过能量转移研究了电子孔对注入.
进行了能源转移效率和速率的理论和实验分析.

主要成果:

从量子井到纳米晶体实现了高效的能量转移 (>50%).
证明能量转移有效地与量子井中的电子孔重组相竞争.
观察到的能量转移速率足以刺激发射.

结论:

开发了一种可行的方法,用于对纳米晶体的间接电.
这种方法有助于创建基于纳米晶体的光学放大器和激光器.
克服了用于电刺激的绝缘封闭层的隔离障碍.

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