期刊
APPLIED PHYSICS LETTERS
卷 112, 期 4, 页码 -出版社
AMER INST PHYSICS
DOI: 10.1063/1.5010880
关键词
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资金
- Ministry of Science and Technology of Taiwan [104-2218-E-110-008-MY3, 103-2112-M-110-012-MY3]
- Faculty of Engineering and Architecture of Ghent University
- Ph.D. Fellowship of the Research Foundation-Flanders
Selection of the bandedge lasing mode of a photonic crystal laser has been realized in a fluorescent dye doped chiral nematic liquid crystal by exerting electrical control over the mode competition. The bandedge lasing can be reversibly switched from the short-wavelength edge mode to the long-wavelength edge mode by applying a voltage of only 20V, without tuning the bandgap. The underlying mechanism is the field-induced change in the order parameter of the fluorescent dye in the liquid crystal. The orientation of the transition dipole moment determines the polarization state of the dye emission, thereby promoting lasing in the bandedge mode that favors the emission polarization. Moreover, the dynamic mode-selection capability is retained upon polymer-stabilizing the chiral nematic liquid crystal laser. In the polymer-stabilized system, greatly improved stability and lasing performance are observed. Published by AIP Publishing.
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