1. Low-Threshold Wavelength-Switchable Organic Nanowire Lasers Based on Excited-State Intramolecular Proton Transfer.
- Author
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Zhang, Wei, Yan, Yongli, Gu, Jianmin, Yao, Jiannian, and Zhao, Yong Sheng
- Subjects
NANOWIRES ,INTRAMOLECULAR proton transfer reactions ,PHOTOISOMERIZATION ,PHOTOCHROMISM ,ELECTRON diffraction - Abstract
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. [ABSTRACT FROM AUTHOR]
- Published
- 2015
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