Synthesis And Characterization Of Near-infrared Luminescent Materials Containing Erbium For Organic Waveguide Amplifier

With the rapid expansion of information technology, O/E information materialspossessing of storage, transmission and display are considered a hot topic of ITresearch, novel functional materials are required increasingly. Optical polymers aresubstituting inorganic counterparts in optical communication owing to their easierprocessibility and excellent optical performance. The key point of capability ofinformation transmission and fabrication of integrated waveguide devices is to studyorganic arrayed waveguide grating(AWG), organic waveguide amplifier coupledwith AWG is a potential project in the field of optical communication andinterconnection.Erbium(Er³⁺) ion has received special attention on the near-infraredphotoluminesence at wavelength of 1.54μm. At present, the preparation of organicerbium doped waveguide amplifier(EDWA) is on fundamental research and focus onErbium complexes co-doped polymer. Organic compounds containing rare earth ionare receiving increasing attention since they combine the advantages of the organicligand(high absorption cross section, good solubility) with the advantages of Er3+inorganic compound(sharp emission band, long emission lifetime).In this paper, we synthesized two series of near-infrared luminescent erbiumorganic complexes including bonding-type and doping-type complexes.Bonding-type organic complexes have been prepared and determined by FT-IR,1H-NMR, UV-Vis-NIR spectrum, the polymeric reactivity groups(–C=C) wereintroduced into the formula structure of complexes. An intense near-infraredemission at wavelength of 1.54μm was observed under the excitation of a 488nmlaser light at room temperature. Melting blending is an easy method to prepare theblends of Er organic complex and polymer. 1,10-phenanth-roline is a conjugateligand and possesses of rigid and sameside rings which make the structure ofcomplexes stable. Through DSC and TGA analyses, the rare earth complexes showhigh decompound temperatures, which indicates a good thermal stability and benefitto intermingle with polymer.Binuclear organic complex Er2(BMA)6(Phen)2 has been synthesized byhydrothermal method and determined by X-ray diffraction, two Er3+ are bridged bytwo C6H5COO-groups and formed biquaternion conjugate ring, this structure maybeachieve the transmission of energy between two metal ions. Through PLanalyse,binuclear complex showes high photoluminescent intensity and large fullwidth at half maxium(FWHM). It can be seen C6H5COO-groups modified thedistance of two Er3+ efficiently and increased the concentration of Er3+ in thematrix,which further enhance the emission efficiency of Er3+.We have synthesized Er Complex-co-MMA-co-GMA polymer, the copolymershows excellent film-forming capability and high optical transparency, thenear-infrared emission at wavelength of 1.54μm was observed, the full width at halfmaxium is measured to be about 60nm, this value is larger than those of silica-basedglasses.. The refractive index of the copolymer can be adjusted by doping bisphenolA epoxy. The waveguide device was fabricated by spin-coating films, usingaluminum as mask and oxygen reactive ion etching.