竖直生长有机单晶微米线的制备及其光波导性能

利用物理气相沉积法来制备有机微米线,并根据气相沉积中基底表面对材料的成核与生长动力学的影响规律,通过对基底表面的亲水处理,来控制微米线的成核过程,从而实现了微米线有序阵列的制备,进而研究了垂直微米线的光波导性能。与水平生长的微米线相比,垂直生长的微米线波导性能更高,光损耗小,损耗系数R为0.029 dBμm~(-1),明显低于平躺的微米线(R=0.033 dBμm~(-1))。

Synthesis of Vertical Organic Microwires and Their Optical Properties

π-conjugated semiconductor 9,10-bis(phenylethynyl) anthracene (BPEA) was chosen to synthesize single-crystal microwire arrays by the physical vapor transport (PVT) technique.The intermediate products were observed at different stages of the vapor transport in order to investigate the growth mechanism.The fabricated BPEA microwires can serve as the active optical waveguides that allow the locally excited photoluminescence to propagate along the length of the wires.Compared with that of the flat-lying microwire (R=0.033 dB μm-1), the optical-loss coefficient (R) of vertical BPEA wire is smaller (0.029 dB μm-1), demonstrating lower waveguide loss.