Single‐Crystalline Optical Microcavities from Luminescent Dendrimers
Abstract
Microcrystallites are promising minute mirrorless laser sources. A variety of luminescent organic compounds have been exploited along this line, but dendrimers have been inapplicable owing to their fragility and extremely poor crystallinity. Now, a dendrimer family that overcomes these difficulties is presented. First‐, second‐, and third‐generation carbazole (Cz) dendrimers with a carbon‐bridged oligo(phenylenevinylene) (COPV2) core (GnCOPV2, n=1–3) assemble to form microcrystals. The COPV2 cores align uni/bidirectionally in the crystals while the Cz units in G2‐ and G3COPV2 align omnidirectionally. The dendrons work as light‐harvesting antennas that absorb non‐polarized light and transfer it to the COPV2 core, from which a polarized luminescence radiates. Furthermore, these crystals act as laser resonators, where the lasing thresholds are strongly coupled with the crystal morphology and the orientation of COPV2, which is in contrast with the conventional amorphous dendrimers.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- May 20, 2020
- Source ID
- 10.1002/ange.202000712
Entities
People
- Aswin Asaithambi
- Axel Lorke
- Colin Herzberger
- Fumio Sasaki
- Hayato Tsuji
- Hiroshi Yamagishi
- Hiroyasu Sato
- Ken Albrecht
- Kimihisa Yamamoto
- Kohei Iwai
- Yohei Yamamoto
- Yuji Sato
Organizations
- Clausthal University of Technology
- ERATO
- Japan Science and Technology Agency
- Japan Society for the Promotion of Science
- Kanagawa University
- Kyushu University
- National Institute of Advanced Industrial Science and Technology
- Office of Naval Research
- Rigaku
- Tokyo Institute of Technology
- University of Duisburg-Essen
- University of Tsukuba