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

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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 languageEnglish
Pages (from-to)3957-3959
Number of pages3
JournalApplied Physics Letters
Volume74
Issue number26
DOIs
Publication statusPublished - 1999 Jun 28

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ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

Cite this

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