抄録
Preparation of micrometer-sized spherical particles containing Rhodamine 6G (R6G) has been investigated for the spherical cavity micro-laser . Using phenyl triethoxy silane (PTES) as a starting material, R6G-doped monodisperse spherical particles were prepared by the vibrating orifice technique . Processing is consist of two major processes: (1) Hydrolysis and polymerization of PTES and (2) Droplet formation from PTES oligomers by vibrating orifice technique. A cylindrical liquid jet (PT ES oligomer and R6G diluted with alcohol) passing through the orifice breaks up into equal-sized droplets by mechani cal vibration. Alcohol solvent of these droplets was evaporated during flying with carrier gas and subsequently solidified in ammonium water trap . For making smooth surface and good shaped particles, control of molecular weight of PTES oligomer was essential. R6G-doped hybrid spherical particles of 4~ 10 µm size of cavity structure were successfully obtained . The spherical particles were pumped by a second harmonic pulse of Q-switched Nd:YAG laser (532 nm wavelength) and laser emission peaks were observed at wavelengths which correspond to the resonance modes.
