MoS2 monolayers on nanocavities: Enhancement in light-matter interaction

Corey Janisch, Haomin Song, Chanjing Zhou, Zhong Lin, Ana Laura Elías, Dengxin Ji, Mauricio Terrones, Qiaoqiang Gan, Zhiwen Liu

Research output: Contribution to journalArticlepeer-review

59 Scopus citations

Abstract

Two-dimensional (2D) atomic crystals and van der Waals heterostructures constitutean emerging platform for developing new functional ultra-thin electronic and optoelectronic materials for novel energy-efficient devices. However, in most thin-film optical applications, there is a long-existing trade-off between the effectiveness of light-matter interactions and the thickness of semiconductor materials, especially when the materials are scaled downtoatom thick dimensions. Consequently, enhancement strategies can introduce significant advances to these atomically thick materials and devices. Here wedemonstrate enhanced absorption and photoluminescence generation from MoS2 monolayers coupled with aplanar nanocavity. This nanocavity consistsofan alumina nanolayer spacer sandwiched between monolayer MoS2 and analuminum reflector, and can strongly enhance the light-matter interaction within the MoS2, increasing the exclusive absorptionofmonolayer MoS2 to nearly 70%at awavelengthof450 nm. The nanocavity also modifies the spontaneous emission rate, providing an additional design freedom to control the interaction between light and 2D materials.

Original languageEnglish (US)
Article number025017
Journal2D Materials
Volume3
Issue number2
DOIs
StatePublished - Apr 28 2016

All Science Journal Classification (ASJC) codes

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

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