An objective of this invention is to extend the range of choosing organic
dye compounds as light-absorbing agent in a variety of fields of, for
example, information storage, information display, solar energy
generation, electric machinery apparatus, electric communicating
apparatus, optical apparatus, cloth, building/bedding/decorating product,
sanitary and health goods, and agricultural material by providing an
organic dye compound which is superior in light-absorbing property, light
resistance, and solubility in the near-infrared region: The objective is
attainable by providing a cyanine dye that bears within the same molecule
a plurality of cyanine dye skeletons bound to a divalent group(s) and an
organometallic complex as counter ion, as well as substantially absorbing
a light with a wavelength longer than 700 nm.