Circularly Polarized Emission from Organic-Inorganic Hybrid Perovskites via Chiral Fano Resonances

In Cheol Seo, Yeonsoo Lim, Soo Chan An, Byung Hoon Woo, Seongheon Kim, Jung Geon Son, Seokjae Yoo, Q. Han Park, Jin Young Kim, Young Chul Jun

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

Organic-inorganic hybrid perovskites hold great potential for various optoelectronic devices with exceptional properties. Although the direct generation of circularly polarized emission from perovskites would enable various compact devices, achieving a large degree of circular polarization (DCP) at room temperature still remains challenging. Herein, we demonstrate that DCP can be strongly enhanced at the narrow mode position of chiral Fano resonances. In our design, a perovskite film is spin-coated on a symmetry-broken structure with a relatively large feature size. A large DCP of more than 0.5 is achieved at room temperature without the direct patterning of the perovskite layer. Reciprocity calculation reveals that chiral field enhancement enables the emission of opposite helicity to couple into counter-propagating slab modes and leads to a large DCP. Our design is very general and scalable. Our work may lead to circularly polarized light sources based on various perovskite materials.

Original languageEnglish
Pages (from-to)13781-13793
Number of pages13
JournalACS nano
Volume15
Issue number8
DOIs
Publication statusPublished - 2021 Aug 24

Keywords

  • chiral Fano resonances
  • circularly polarized emission
  • organic-inorganic hybrid perovskites
  • reciprocity
  • symmetry breaking

ASJC Scopus subject areas

  • Materials Science(all)
  • Engineering(all)
  • Physics and Astronomy(all)

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