Ultrathin WS2-on-Glass Photonic Crystal for Self-Resonant Exciton-Polaritonics

Xingwang Zhang, Xiaojie Zhang, Wenzhuo Huang, Kedi Wu, Mengqiang Zhao, A. T. Charlie Johnson, Sefaattin Tongay, Ertugrul Cubukcu

Research output: Contribution to journalArticle

Abstract

Room temperature stable excitons in layered two-dimensional (2D) transition metal dichalcogenides (TMDs) offer a unique route for engineering light and matter interactions. Due to the strong optical dispersion near the excitonic transitions, a high refractive index arises in these ultrathin semiconductors.[1,2] Utilizing this behavior, strongly confined Fano type optical resonances in an ultrathin (i.e., ≈12 nm) tungsten disulfide (WS2) photonic crystal (PhC) directly fabricated on a TMD-on-glass platform are reported. In this approach, Fano-type WS2 photonic resonances strongly couple to the WS2 excitonic dispersion engender self-resonant exciton-polaritons with an out-of-plane optical confinement exceeding that provided by surface plasmon polaritons in the visible. The large spatial light-matter overlap endowed by this unique monolithic self-coupling scheme is utilized for steering of enhanced 2D WSe2 excitonic photoluminescence in a truly TMD integrated system. It is envisioned that the strong light matter interaction on the TMD-on-glass platform will unfold the prospects of ultrathin exciton-polaritonic resonators.

Original languageEnglish (US)
Article number1901988
JournalAdvanced Optical Materials
Volume8
Issue number7
DOIs
StatePublished - Apr 1 2020

Keywords

  • 2D materials
  • exciton-polaritons
  • photonic crystals
  • TMD on glass
  • WS

ASJC Scopus subject areas

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

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  • Cite this

    Zhang, X., Zhang, X., Huang, W., Wu, K., Zhao, M., Charlie Johnson, A. T., Tongay, S., & Cubukcu, E. (2020). Ultrathin WS2-on-Glass Photonic Crystal for Self-Resonant Exciton-Polaritonics. Advanced Optical Materials, 8(7), [1901988]. https://doi.org/10.1002/adom.201901988