Generating scattering dark states through the Fano interference between excitons and an individual silicon nanogroove

Jiahao Yan; Churong Ma; Pu Liu; Chengxin Wang; Guowei Yang

doi:10.1038/lsa.2016.197

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Generating scattering dark states through the Fano interference between excitons and an individual silicon nanogroove

Original Articles

- Generating scattering dark states through the Fano interference between excitons and an individual silicon nanogroove
- Generating scattering dark states through the Fano interference between excitons and an individual silicon nanogroove
- LSA 2017年6卷第1期
- Affiliations：
  
  State Key Laboratory of Optoelectronic Materials and Technologies, Nanotechnology Research Center, School of Materials Science and Engineering, Sun Yat-sen University, Guangzhou, Guangdong 510275, China
- Author bio：
  
  G Yang, Email: stsygw@mail.sysu.edu.cn
- Funds：
- DOI：10.1038/lsa.2016.197
  中图分类号：
- 纸质出版日期：2017-03，
  
  网络出版日期：2016-08-12，
  
  收稿日期：2016-04-19，
  
  修回日期：2016-08-10，
  
  录用日期：2016-08-10
- Accepted：
Scan QR Code
Generating scattering dark states through the Fano interference between excitons and an individual silicon nanogroove[J]. LSA, 2017,6(1).

Yan, J. H. et al. Generating scattering dark states through the Fano interference between excitons and an individual silicon nanogroove. Light: Science & Applications, 6, e16197 (2017).
Generating scattering dark states through the Fano interference between excitons and an individual silicon nanogroove[J]. LSA, 2017,6(1). DOI： 10.1038/lsa.2016.197.

Yan, J. H. et al. Generating scattering dark states through the Fano interference between excitons and an individual silicon nanogroove. Light: Science & Applications, 6, e16197 (2017). DOI： 10.1038/lsa.2016.197.

摘要

Abstract

Effective interactions between excitons and resonating nanocavities are important for many emerging applications in nanophotonics. Although plasmonic nanocavities are considered promising substitutes for diffraction-limited dielectric microcavities

their practical applications are hindered by large ohmic loss and Joule heating. Other than plasmonic materials

high-refractive-index dielectric nanocavities is a new way to trap light in subwavelength scales. However

studies on the interaction between dielectric nanocavities and excitons are still scarce. Here

for the first time

we demonstrate that the Fano interference between molecular excitons and an individual silicon nanogroove can generate scattering dark modes. By placing J-aggregate excitons into a silicon nanogroove

the leaky magnetic resonant modes filling in the groove can tailor their scattering directivity and reduce the uncoupled radiation decay in a specific direction. This unidirectional 'dark state' brings a new approach to tailor the interaction between excitons and nanocavities without large near-field enhancement. By adjusting the resonant modes

the scattering spectra can change from a Fano asymmetric line shape to a significantly suppressed scattering dip. These findings indicate that silicon nanogrooves can provide a platform for integrated on-chip silicon–exciton hybrid optical systems in the future.

关键词

Keywords

excitonslight–matter interactionsmagnetic modesilicon nanogroove

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