The formation of elemental trigonal tellurium (t‐Te) on tellurite glass surfaces exposed to femtosecond laser pulses is discussed. Specifically, the underlying elemental crystallization phenomenon is investigated by altering laser parameters in common tellurite glass compositions under various ambient conditions. Elemental crystallization of t‐Te by a single femtosecond laser pulse is unveiled by high‐resolution imaging and analysis. The thermal diffusion model reveals the absence of lattice melting upon a single laser pulse, highlighting the complexity of the phase transformation. The typical cross‐section displays three different crystal configurations over its depth, in which the overall thickness increases with each subsequent pulse. The effect of various controlled atmospheres shows the suppressing nature of the elemental crystallization, whereas the substrate temperature shows no significant impact on the nucleation of t‐Te nanocrystals. This research gives new insight into the elemental crystallization of glass upon femtosecond laser irradiation and shows the potential to fabricate functional transparent electronic micro/nanodevices.

As an anniversary event of International Year of Glass (IYOG), especially to help advertisement of IYOG in Japan, we devoted ourselves for half a year of making a glass poster, called "Ikka-ni Ichimai [the annual S&T (Science and Technology) poster for everyone, in Japanese]". The title of the poster is "GLASS -The most universal modern material", and is already distributed, by Japanese Ministry of Education, Culture, Sports, Science and Technology (MEXT), to all over Japan from elementary to high school, and even university. The distribution is done to promote their interests for science and technology. The final products, the poster, the corresponding webpage, and the movies to explain how to enjoy the poster, are very much welcomed by many people including kids and students who do not major in glass. The poster shows how glass has been evolved by humankind, and how it supported human life to develop. We are quite confident that people can understand, by looking through this poster, how inevitable glass is, in various fields; from culture and art, medicine, science, and technology. Our hopes are to evoke interests of children to glass and material science, which, in a long term, help continuous evolution of glass for the future which supports the humankind.