Silicon-Phosphorene Nanocavity-Enhanced Optical Emission at Telecommunications Wavelengths

Chad Husko, Joohoon Kang, Gregory Moille, Joshua D. Wood, Zheng Han, David Gosztola, Xuedan Ma, Sylvain Combrié, Alfredo De Rossi, Mark C. Hersam, Xavier Checoury, Jeffrey R. Guest

Research output: Contribution to journalArticlepeer-review

10 Citations (Scopus)


Generating and amplifying light in silicon (Si) continues to attract significant attention due to the possibility of integrating optical and electronic components in a single material platform. Unfortunately, silicon is an indirect band gap material and therefore an inefficient emitter of light. With the rise of integrated photonics, the search for silicon-based light sources has evolved from a scientific quest to a major technological bottleneck for scalable, CMOS-compatible, light sources. Recently, emerging two-dimensional materials have opened the prospect of tailoring material properties based on atomic layers. Few-layer phosphorene, which is isolated through exfoliation from black phosphorus (BP), is a great candidate to partner with silicon due to its layer-tunable direct band gap in the near-infrared where silicon is transparent. Here we demonstrate a hybrid silicon optical emitter composed of few-layer phosphorene nanomaterial flakes coupled to silicon photonic crystal resonators. We show single-mode emission in the telecommunications band of 1.55 μm (Eg = 0.8 eV) under continuous wave optical excitation at room temperature. The solution-processed few-layer BP flakes enable tunable emission across a broad range of wavelengths and the simultaneous creation of multiple devices. Our work highlights the versatility of the Si-BP material platform for creating optically active devices in integrated silicon chips.

Original languageEnglish
Pages (from-to)6515-6520
Number of pages6
JournalNano letters
Issue number10
Publication statusPublished - Oct 10 2018


  • nanomaterials
  • nanophotonics
  • phosphorene
  • silicon optical emission
  • silicon photonics
  • two-dimensional materials

ASJC Scopus subject areas

  • Bioengineering
  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanical Engineering

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