11 October 2012 Novel cholesteric materials doped with CdSe/ZnS quantum dots with photo- and electrotunable circularly polarized emission
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Abstract
Optical materials based on cholesteric liquid crystals (LCs) doped with fluorescent CdSe/ZnS quantum dots (QDs) have been developed and demonstrated to have a wide photonic band gap. It has been shown that the fluorescence emission of QDs embedded in LCs is circularly polarized and that the dissymmetry factor of this polarization may be optically or electrically controlled via conformational changes in the helical structure of the LC matrix. The possibility of photochemical patterning or image recording using these materials has been demonstrated; the recorded information can be read through changes in the dissymmetry factor of circular polarization of QDs emission. The developed photo- and electro-active materials with a controlled degree of fluorescence circular polarization may be used as on-demand single photon sources in photonics, optoelectronics, and quantum cryptography, as well as for development of nanophotonic systems capable of low-threshold lasing.
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Konstantin E. Mochalov, Konstantin E. Mochalov, Alexey Yu. Bobrovsky, Alexey Yu. Bobrovsky, Vladimir A. Oleinikov, Vladimir A. Oleinikov, Alyona V. Sukhanova, Alyona V. Sukhanova, Anton E. Efimov, Anton E. Efimov, Valery Shibaev, Valery Shibaev, Igor Nabiev, Igor Nabiev, } "Novel cholesteric materials doped with CdSe/ZnS quantum dots with photo- and electrotunable circularly polarized emission", Proc. SPIE 8475, Liquid Crystals XVI, 847514 (11 October 2012); doi: 10.1117/12.929729; https://doi.org/10.1117/12.929729
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