Abstract
The thermal stability of self-assembled porous nanogratings inscribed
by an infrared femtosecond (fs) laser in five commercial glasses (BK7,
soda lime, 7059, AF32, and Eagle XG) is monitored using step
isochronal annealing experiments. Their erasure, ascertained by
retardance measurements and attributed to the collapse of nanopores,
is well predicted from the Rayleigh–Plesset (R–P) equation. This
finding is thus employed to theoretically predict the erasure of
nanogratings in the context of any time–temperature process
(e.g., thermal annealing, laser irradiation process). For example, in
silica glass (Suprasil CG) and using a simplified form of the R–P
equation, nanogratings composed of 50 nm will erase within ∼30min, ∼1µs, and ∼30ns at temperatures of ∼1250∘C, 2675°C, and 3100°C, respectively.
Such conclusions are expected to provide guidelines to imprint
nanogratings in oxide glasses (for instance, in the choice of laser
parameters) or to design appropriate thermal annealing protocols for
temperature sensing.
Funder
Agence Nationale de la
Recherche
China Scholarship Council
Subject
Atomic and Molecular Physics, and Optics,Engineering (miscellaneous),Electrical and Electronic Engineering
Cited by
7 articles.
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