Three-dimensional optical memory using a human fingernail
Akihiro Takita, Hirotsugu Yamamoto, Yoshio Hayasaki, and Nobuo Nishida,
The University of Tokushima; Hiroaki Misawa, Hokkaido University
Abstract
We realized optical data storage in a human fingernail. A structural
change is recorded by irradiating a focused femtosecond laser pulse and
is read out with fluorescent observation by making use of an increased
fluorescence intensity. The shape of the structural changes drastically
depends on the irradiated pulse energy. The fluorescence spectrum of the
structure coincided with the auto-fluorescence spectra of a fingernail and
a heated fingernail. It is suggested that the increased fluorescence is
most likely caused by a local denaturation of the keratin protein by the
femtosecond laser pulse irradiation. We demonstrate that the increased
fluorescence effect is useful for reading out three-dimensionally
recorded data.
http://www.opticsexpress.org/abstract.cfm?URI=OPEX-13-12-4560
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*** Xanni ***
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mailto:xanni@xanadu.net Andrew Pam
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