摘要
White lasers are becoming increasingly relevant in various fields since they exhibit unprecedented properties in terms of beam brightness and intensity modulation.Here we introduce a white laser based on a polymer matrix encompassing liquid crystals and multiple organic chromophores in a multifunctional phase-separation system.The separation of the hydrophilic matrix and the hydrophobic liquid crystals leads to the formation of a complex optically active layer,featuring lasing emission tuneable from blue to red.White laser emission is found with an optical excitation threshold of approximately 12 mJ/cm^(2).Importantly,an external electric field can be used to control the device emission intensity.White lasers with low-voltage(≤10 V)controllable emission might pave the way for a new generation of broadband light sources for analytical,computational,and communication applications.
基金
funding from the European Research Council under the European Union’s Horizon 2020 Research and Innovation Programme(Grant Agreement no.682157,“xPRINT”)
the support from the project PRA_2018_34(“ANISE”)
from the University of Pisa and from the project PRIN 2017PHRM8X(“3D-Phys”)
from the Italian Minister of University and Research
the support from the Foundation for Polish Science(FNP)
the support of The National Science Center,Poland(2018/31/B/ST8/02832)
of the Wroclaw University of Science and Technology.
