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Wavelength‐Controlled Organic Microlasers Based on Polymorphism‐Dependent Intramolecular Charge‐Transfer Process
Author(s) -
Dong Haiyun,
Zhang Chunhuan,
Yao Jiannian,
Zhao Yong Sheng
Publication year - 2016
Publication title -
chemistry – an asian journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.18
H-Index - 106
eISSN - 1861-471X
pISSN - 1861-4728
DOI - 10.1002/asia.201600387
Subject(s) - lasing threshold , materials science , wavelength , optoelectronics , laser , intramolecular force , excited state , photonics , amplified spontaneous emission , optics , chemistry , physics , nuclear physics , stereochemistry
Wavelength‐tunable micro/nanoscale lasers are particularly attractive as indispensible building blocks for various ultracompact photonic devices. Polymorphic organic materials display distinct emission colors in different crystal forms, providing the potential possibility in tailoring the lasing wavelength. Here we report wavelength‐controlled microlasers based on the polymorphism‐dependent intramolecular charge‐transfer (ICT) process in organic microcrystals. With different solution‐phase self‐assembly methods, three kinds of microstructures were prepared from the same organic ICT compound, where the different crystal structures offer completely distinct molecular environments, having a significant influence on the excited‐state ICT process and therefore the emission wavelength. As a result, we realized three different color lasing actions in these three kinds of organic ICT microcystals under two‐photon pumping. The results demonstrated here provide useful insights for the rational design of miniaturized lasers with desired performances.