Here we present a
newly synthesized bifunctional organic chromophore
with appealing spectroscopic and nonlinear optical features. The positions
of absorption and emission maxima of the dye vary with increasing
solvent polarity and exhibit positive solvatochromism. The determined
change in the dipole moment upon excitation based on the Bilot and
Kawski theory is 5.94 D, which corresponds to the intermolecular displacement
of a charge equal to 1.24 Å. An investigated organic-based system
represents a significant, repeatable, and stable over time optical
signal modulation in the manner of the refractive index value. Its
magnitude is varied both by optical pumping intensity as well as by
external frequency modulation, which indicates that such system is
an alluring and alternative core unit for optoelectronic devices and
complex networks. Then, the same active system, due to the nonresonant
mechanism of higher harmonics of light inducement, can provide second
and third harmonic signals. According to the introduced laser
line spatial modifications (parallel or perpendicular polarization
directions), it is resulted in output SHG signal with magnitude varied
about 100%. Its magnitude is noticeably small; however, to construct
sensitive optical sensors or infrared indicators, such feature may
guarantee satisfying circumstances.