Efficient light generation from enhanced inelastic electron tunnelling

Haoliang Qian, Su Wen Hsu, Kargal Gurunatha, Conor T. Riley, Jie Zhao, Dylan Lu, Andrea R. Tao, Zhaowei Liu

研究成果: Letter

20 引文 斯高帕斯(Scopus)

摘要

Light emission from biased tunnel junctions has recently gained much attention owing to its unique potential to create ultracompact optical sources with terahertz modulation bandwidth1–5. The emission originates from an inelastic electron tunnelling process in which electronic energy is transferred to surface plasmon polaritons and subsequently converted to radiation photons by an optical antenna. Because most of the electrons tunnel elastically, the emission efficiency is typically about 10−5–10−4. Here, we demonstrate efficient light generation from enhanced inelastic tunnelling using nanocrystals assembled into metal–insulator–metal junctions. The colour of the emitted light is determined by the optical antenna and thus can be tuned by the geometry of the junction structures. The efficiency of far-field free-space light generation reaches ~2%, showing an improvement of two orders of magnitude over previous work3,4. This brings on-chip ultrafast and ultracompact light sources one step closer to reality.

原文English
頁(從 - 到)485-488
頁數4
期刊Nature Photonics
12
發行號8
DOIs
出版狀態Published - 2018 八月 1

    指紋

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics

引用此

Qian, H., Hsu, S. W., Gurunatha, K., Riley, C. T., Zhao, J., Lu, D., Tao, A. R., & Liu, Z. (2018). Efficient light generation from enhanced inelastic electron tunnelling. Nature Photonics, 12(8), 485-488. https://doi.org/10.1038/s41566-018-0216-2