Optical Bit Recording in a Human Fingernail

Akihiro Takita; Mitsuru Watanabe; Hirotsugu Yamamoto; Shigeki Matsuo; Hiroaki Misawa; Yoshio Hayasaki; Nobuo Nishida

doi:10.1143/JJAP.43.168

Optical Bit Recording in a Human Fingernail

Akihiro Takita, Mitsuru Watanabe, Hirotsugu Yamamoto, Shigeki Matsuo, Hiroaki Misawa, Yoshio Hayasaki, Nobuo Nishida

Department of Mechanical Engineering

Research output: Contribution to journal › Article

12 Citations (Scopus)

Abstract

Optical bit recording in a human fingernail is demonstrated by using a femtosecond laser processing technique. A bit is formed in a fingernail by irradiation of a focused femtosecond laser pulse. We have investigated the dependence of the irradiation pulse energy on the diameter and length of the formed bit. The bit diameter and length are theoretically explained based on a Gaussian beam irradiation model. Furthermore, the achievable recording density is estimated from the measured bit diameter and bit length. We have found that the pulse energy required to form a bit depends on the recording depth and the surface condition of the fingernail.

Original language	English
Pages (from-to)	168-171
Number of pages	4
Journal	Japanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers
Volume	43
Issue number	1
DOIs	https://doi.org/10.1143/JJAP.43.168
Publication status	Published - 2004 Jan

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Keywords

Biological tissue
Femtosecond laser processing
Human fingernail
Three-dimensional optical data storage

ASJC Scopus subject areas

Engineering(all)
Physics and Astronomy(all)

Cite this

Takita, A., Watanabe, M., Yamamoto, H., Matsuo, S., Misawa, H., Hayasaki, Y., & Nishida, N. (2004). Optical Bit Recording in a Human Fingernail. Japanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers, 43(1), 168-171. https://doi.org/10.1143/JJAP.43.168

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Access to Document

10.1143/JJAP.43.168