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使用活跃光学天线进行光学检测
Mark W Knight1, Heidar Sobhani, Peter Nordlander
1Department of Electrical and Computer Engineering, Rice University, Houston, TX 77005, USA.
Science (New York, N.Y.)
|May 10, 2011
概括
金属纳米天线现在可以收获光线并检测到它. 这种新的双重功能结构从等离子体衰变中产生光电流,产生紧的,灵敏的光探测器,具有扩展的光谱响应.
科学领域:
- 光电学是指光电子产品.
- 塑制剂的使用方法
- 纳米技术 纳米技术
背景情况:
- 纳米天线对于收集光线至关重要,而光二极管则使光检测成为可能.
- 这两个功能传统上是分开的和独立的.
- 将这些功能整合到一个单一的设备中是一个重大挑战.
研究的目的:
- 为了展示一个单一的纳米结构,它结合了光收获和光检测.
- 为了研究这种装置中光电流的产生机制.
- 为了描述这款新型双功能光探测器的性能.
主要方法:
- 与半导体集成的金属纳米天线的制造.
- 将光子合到纳米天线中以激发表面等离子体.
- 测量因热电子注入潜在屏障而产生的光电流.
主要成果:
- 在一个纳米天线结构中成功集成光采集和光检测.
- 从共振等离子体衰变和热电子注入中产生的光电流生成的观察.
- 一个紧的,波长共振的,极化特定的光探测器的演示.
结论:
- 开发的双功能纳米天线结构有效地结合了光采集和光检测.
- 这项技术为制造非常紧和敏感的光学探测器提供了新的途径.
- 该设备表现出独特的光谱响应特征,延伸到半导体带边缘以下.
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