2018年10月
Energy Transfer-Assisted Whispering Gallery Mode Lasing in Conjugated Polymer/Europium Hybrid Microsphere Resonators
Chemistry, an Asian journal
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- 巻
- 14
- 号
- 10:::SI
- 開始ページ
- 1637
- 終了ページ
- 1641
- 記述言語
- 英語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.1002/asia.201801219
- 出版者・発行元
- WILEY-V C H VERLAG GMBH
Lanthanide metal complexes display luminescence with narrow bandwidth. Here, we present coupling of the luminescence from europium ion (Eu3+) with whispering gallery modes (WGMs) in conjugated polymer microsphere resonators. Self-assembly of fluorene-terpyridine alternating copolymer, coordinated by Eu3+ (F8tpy-Eu3+), forms well-defined microspheres with the average diameter of 3.2 µm. Upon focused laser excitation, a microsphere of F8tpy copolymer displays WGM photoluminescence (PL) at a wide spectral range from 420 to 680 nm. In contrast, F8tpy-Eu3+ hybrid microspheres exhibit sharp WGM PL at a narrow spectral range of 615-630 nm, which is characteristic of a luminescence from Eu3+. The PL behavior indicates that photoinduced energy transfer from F8tpy to Eu3+ occurs efficiently. Furthermore, the intensity of the PL peak increases nonlinearly upon strong pumping, indicating that a lasing action appears with the threshold of 1.85 mJ cm-2. These results will pave the way to developing microlasers and photonic devices from soft organic materials.
- ID情報
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- DOI : 10.1002/asia.201801219
- ISSN : 1861-4728
- PubMed ID : 30302941