|Author||He, Tingchao ♦ Tian, Xiaoqing ♦ Lin, Xiaodong ♦ Wang, Yue ♦ Zhao, Xin ♦ Sun, Handong ♦ Gao, Yang ♦ Grimsdale, Andrew C.|
|Source||United States Department of Energy Office of Scientific and Technical Information|
|Subject Keyword||CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS ♦ ABSORPTION ♦ CROSS SECTIONS ♦ DMSO ♦ DYES ♦ FLUORESCENCE ♦ MOLECULES ♦ NONLINEAR PROBLEMS ♦ PHOTONS ♦ POTENTIALS ♦ PROBES ♦ SENSORS ♦ STILBENE ♦ VISIBLE RADIATION ♦ WAVELENGTHS|
|Abstract||Light-emitting nonlinear optical molecules, especially those with large Stokes shifts and broad tunability of their emission wavelength, have attracted considerable attention for various applications including biomedical imaging and fluorescent sensors. However, most fluorescent chromophores have only limited potential for such applications due to small Stokes shifts, narrow tunability of fluorescence emissions, and small optical nonlinearity in highly polar solvents. In this work, we demonstrate that a two-photon absorbing stilbene chromophore exhibits a large two-photon absorption action cross-section (ηδ = 320 GM) in dimethylsulfoxide (DMSO) and shows broad fluorescence tunability (125 nm) by manipulating the polarity of the surrounding medium. Importantly, a very large Stokes shift of up to 227 nm is achieved in DMSO. Thanks to these features, this chromophore can be utilized as a two-photon probe for bioimaging applications and in an ultrasensitive solid-state gas detector.|
|Learning Resource Type||Article|
|Publisher Place||United States|
|Journal||Applied Physics Letters|
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