Directive emission from polymeric fluorophore with epsilon-near-zero squaraine molecular film
- 주제(키워드) directive emission , epsilon-near-zero , metamaterials , organic plasmonics , photoluminescence
- 등재 SCIE, SCOPUS
- OA유형 gold
- 발행기관 De Gruyter Open Ltd
- 발행년도 2023
- 총서유형 Journal
- URI http://www.dcollection.net/handler/ewha/000000208620
- 본문언어 영어
- Published As https://doi.org/10.1515/nanoph-2022-0763
초록/요약
Enhanced directionality of photoluminescence emission has attracted attention due to its diverse application areas ranging from single-photon sources to fluorescence sensing and bio-imaging. Utilization of null phase advance in epsilon-near-zero (ENZ) medium is an important scheme to achieve the directive emission. Despite various designs proposed for ENZ-based directive emission, most of the ENZ mediums are restricted to subwavelength structures of metallic plasmonics or inorganic dielectrics. Here, we introduce an organic ENZ film placed on top of a polymeric fluorophore film to demonstrate a directive emission. By taking advantage of the structural coherence in the P3HT film and the ENZ response in the squaraine molecular film, 42% increase in directive emission is achieved. Capability to control directive emission with organic ENZ films is highly useful in applications requiring bio-compatibility of a fluorophore-embedding medium. © 2023 the author(s), published by De Gruyter, Berlin/Boston.
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