Abstract
We have found that multi-color can be generated in soda-lime-glass containing Ag particles by femtosecond laser irradiation. Soda-lime-glass (bottle glass) was ion-exchanged in AgNO3/NaNO3 and heat-treated. With the femtosecond laser irradiation, the irradiated spot initially changed from original yellow to reddish, and then finally changed to blue.