Transmission and photoluminescence images of three-dimensional memory in vitreous silica

Mitsuru Watanabe; Saulius Juodkazis; Hong Bo Sun; Shigeki Matsuo; Hiroaki Misawa; Masafumi Miwa; Reizo Kaneko

doi:10.1063/1.124235

Transmission and photoluminescence images of three-dimensional memory in vitreous silica

Mitsuru Watanabe, Saulius Juodkazis, Hong Bo Sun, Shigeki Matsuo, Hiroaki Misawa, Masafumi Miwa, Reizo Kaneko

Department of Mechanical Engineering

Research output: Contribution to journal › Article

55 Citations (Scopus)

Abstract

We demonstrate separate readouts of three-dimensional memory by (i) transmission imaging using a conventional optical microscope and (ii) photoluminescence (PL) of the bits created by inducing optical damage within the vitreous silica. Recording was done by tightly focused (objective ×100, numerical aperture 1.3) single shot irradiation of 120 fs duration pulses at a 400 nm wavelength. For the readout, a broadband of PL at 470-600 nm was excited by 400 nm, 120 fs irradiation with pulse energy smaller by a factor of 10⁶ compared with that for the recording. We found an erasing of the PL after 400°C annealing, while the readability of the bits by the transmission was sustained. This shows the potential for two-bit information recording per single bit by means of separate readout procedures.

Original language	English
Pages (from-to)	3957-3959
Number of pages	3
Journal	Applied Physics Letters
Volume	74
Issue number	26
DOIs	https://doi.org/10.1063/1.124235
Publication status	Published - 1999 Jun 28

ASJC Scopus subject areas

Physics and Astronomy (miscellaneous)

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Watanabe, M., Juodkazis, S., Sun, H. B., Matsuo, S., Misawa, H., Miwa, M., & Kaneko, R. (1999). Transmission and photoluminescence images of three-dimensional memory in vitreous silica. Applied Physics Letters, 74(26), 3957-3959. https://doi.org/10.1063/1.124235

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AU - Miwa, Masafumi

AU - Kaneko, Reizo

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