We report the fabrication of nanoparticles that contain metal nanoclusters at the surface of the CaO-B 2 O 3 -Bi 2 O 3 -Al 2 O 3 -TiO 2 glass using XeCl laser irradiation. We have demonstrated that the surface morphology such as that containing nanoparticles or a smooth flat surface can be controlled by laser irradiation conditions; the laser fluence, repetition rate, and temperature of the glass. The transmission electron microscope (TEM) images of the cross section of the nanoparticles show

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... at the metal nanoclusters were formed inside the nanoparticle by XeCl pulsed laser irradiation, a unique phenomenon different from TiO 2 -crystallization achieved by conventional heat-treatment of the glass. Since formation of nanoparticles containing metal nanocluster is a phenomenon different from previous papers about XeCl laser irradiation of oxide glasses, the combined process of pulsed laser irradiation and heat-treatment will open a wide variety of optical glass devices.