title: Polarization modulation of two-photon excited fluorescence in a V-shaped dipicolinate-triphenylamine compound.
abstract: Polarization modulation of two-photon excited fluorescence in a V-shaped dipicolinate-triphenylamine compound was investigated with 100 fs 800 nm laser pulses. The peak fluorescence intensity versus the input irradiance was measured to meet a square dependence, which offered evidence for two-photon excited fluorescence. The variations of the two-photon excited fluorescence intensity showed strong response to the different polarized incident lights and were tightly dependent on the linearly polarized component of the incident light. Furthermore, the polarization modulation efficiency of the two-photon excited fluorescence had an obvious concentration dependence when the concentration of solution was under 2.5×10(-4)  mol/L. The enhancement of modulation efficiency was attributed to the concentration dependence of the two-photon absorption cross section.
authors.forename: Pengfei
authors.initials: P
authors.lastname: Zeng
authors.forename: Jianhao
authors.initials: J
authors.lastname: Wang
authors.forename: Changshun
authors.initials: C
authors.lastname: Wang
authors.forename: Hongjing
authors.initials: H
authors.lastname: Li
authors.forename: Peng
authors.initials: P
authors.lastname: Cai
mesh_terms: D000588:Amines / Q000737:chemistry*; D003287:Contrast Media / Q000737:chemistry; D005456:Fluorescent Dyes / Q000737:chemistry*; D008027:Light; D008422:Materials Testing; D036641:Microscopy, Fluorescence, Multiphoton / Q000379:methods*; D010848:Picolinic Acids / Q000737:chemistry*; D012031:Refractometry / Q000379:methods*; D012542:Scattering, Radiation; D013730:Terphenyl Compounds / Q000737:chemistry*
chemical_list: D000588:Amines; D003287:Contrast Media; D005456:Fluorescent Dyes; D010848:Picolinic Acids; D013730:Terphenyl Compounds; C004860:dipicolinic acid