Journal
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
Volume 54, Issue 24, Pages 7125-7129Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201502684
Keywords
excited-state intramolecular proton transfer; laser switch; nanophotonics; organic nanowire; nanowire laser
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Funding
- National Natural Science Foundation of China [21125315, 21221002]
- Ministry of Science and Technology of China [2012YQ120060]
- Strategic Priority Research Program of the Chinese Academy of Sciences [XDB12020300]
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Coherent light signals generated at the nanoscale are crucial to the realization of photonic integrated circuits. Self-assembled nanowires from organic dyes can provide both a gain medium and an effective resonant cavity, which have been utilized for fulfilling miniaturized lasers. Excited-state intramolecular proton transfer (ESIPT), a classical molecular photoisomerization process, can be used to build a typical four-level system, which is more favorable for population inversion. Low-power driven lasing in proton-transfer molecular nanowires with an optimized ESIPT energy-level process has been achieved. With high gain and low loss from the ESIPT, the wires can be applied as effective FP-type resonators, which generated single-mode lasing with a very low threshold. The lasing wavelength can be reversibly switched based on a conformation conversion of the excited keto form in the ESIPT process.
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