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相关概念视频

Imperfections in Crystal Structure: Stoichiometric Point Defects01:26

Imperfections in Crystal Structure: Stoichiometric Point Defects

Schottky defects arise when some lattice points in a crystal, such as those in NaCl, remain unoccupied, creating lattice vacancies without disturbing the overall electrical neutrality of the crystal. This defect is common in ionic crystals where the positive and negative ions are similar in size, as seen in sodium chloride and cesium chloride. The presence of Schottky defects enables the crystal to conduct electricity to a small extent through an ionic mechanism. Electric fields cause nearby...

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Polycrystalline Silicon Thin-film Solar cells with Plasmonic-enhanced Light-trapping
09:32

Polycrystalline Silicon Thin-film Solar cells with Plasmonic-enhanced Light-trapping

Published on: July 2, 2012

在纳米晶体的光学增益.

L Pavesi1, L Dal Negro, C Mazzoleni

  • 1INFM & Dipartimento di Fisica, Università di Trento, Povo, Italy. pavesi@science.unitn.it

Nature
|December 2, 2000
PubMed
概括

研究人员在量子点中实现了光放大,为激光器铺平了道路. 这一突破克服了.

科学领域:

  • 材料科学 材料科学 材料科学
  • 光电学是指光电子产品.
  • 纳米技术 纳米技术

背景情况:

  • 将光学功能集成到微电子芯片中是一个重要的材料研究挑战.
  • 的间接带隙使其成为一种低效的光发射器,需要复合半导体进行光电子集成.
  • 现有的复合半导体激光器利用了像量子井和量子点这样的低维系统.

研究的目的:

  • 为了证明直接在内部的光放大.
  • 探索基于的材料在激光制造中的潜力.
  • 为了克服的间接带隙在光学应用中的局限性.

主要方法:

  • 在二氧化矩阵内制造量子点.
  • 在波导和传输配置中实验证明净光学增益.
  • 基于Si/SiO2接口状态的群体反转的理论模型的开发.

主要成果:

  • 使用量子点实现了光放大.
  • 观察到的净光学增益与直接带隙量子点相比较.
  • 验证了一种解释Si/SiO2界面通过辐射状态增加的模型.

结论:

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Characterization of SiN Integrated Optical Phased Arrays on a Wafer-Scale Test Station
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Published on: April 1, 2020

  • 证明了在纳米结构中实现光学增益的可行性.
  • 开辟了一条全由制造激光器的新途径.
  • 在芯片上实现光学和电子功能的单体集成的潜力.