Metal nanoparticle precipitation in periodic arrays in Au[sub 2]O-doped glass by two interfered femtosecond laser pulses

Qu, Shiliang; Qiu, Jianrong; Zhao, Chongjun; Jiang, Xiongwei; Zeng, Huidan; Zhu, Congshan; Hirao, K.
March 2004
Applied Physics Letters;3/22/2004, Vol. 84 Issue 12, p2046
Academic Journal
We report on the precipitation control of Au nanoparticles in periodic arrays in silicate glass. Au[sub 2]O-doped glass samples were first irradiated by two 800 nm interfered femtosecond laser pulses at room temperature and then heat treated at 550 °C for the Au nanoparticle precipitation in the laser irradiation areas. One-dimensional periodic arrays of the Au nanoparticles were controlled by changing the pulse energy and the incident angle between the interfered laser pulses. The smallest dimension in the obtained arrays was a width of 300 nm. The mechanism of the metal nanoparticle precipitation by this technique was discussed. Only two pulses are required to encode these periodic microstructures, which are applicable to emerging nanostructure devices such as optical memory with ultrahigh storage density, micrograting with high diffractive efficiency and integrative micro-optical switches. © 2004 American Institute of Physics.


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