Chinese Optics Letters, 2024, 22 (3): 033801, Published Online: Mar. 22, 2024
Microstructured fluorescence in liquid crystals with femtosecond laser excitation
Abstract
This study investigated direct fluorescence generation from a nematic liquid crystal (NLC) NJU-LDn-4 under femtosecond laser excitation. The absorption, transmittance, excitation, and emission spectra of the NLC were assessed. The relationship between the femtosecond pump power and fluorescence intensity was analyzed, revealing a quadratic increase and indicating that two-photon absorption (2PA) is the primary fluorescence mechanism. The LC microstructure was designed using photoalignment technology, allowing the generated fluorescence to reflect the corresponding structure. This research can establish a foundation for tunable LC microstructured fluorescence, with potential applications in fluorescence microscopy and optoelectronics.
Xia Meng, Ping Jin, Shijun Ge, Jiao Liu, Bingxiang Li, Lei Wang, Yanqing Lu. Microstructured fluorescence in liquid crystals with femtosecond laser excitation[J]. Chinese Optics Letters, 2024, 22(3): 033801.