Two-photon readout of three-dimensional memory in silica

M. Watanabe, S. Juodkazis, H. B. Sun, Shigeki Matsuo, H. Misawa

Research output: Contribution to journalArticle

76 Citations (Scopus)

Abstract

We report the readout of three-dimensional (3D) optical memory in silica by detecting the photoluminescence (PL) of the bits (voxels). A broad defect-related PL band at 400-700 nm was excited by two-photon absorption of femtosecond (pulse duration of 120 fs) illumination at 795 nm. We employed a simple reflection-type scanning readout without the use of a confocal detection scheme to read 3D memory by recording the PL of the bits (the same objective lens was used for the excitation and the collection of the PL). Bit plane separation as small as 3 μm was resolved without cross talk, when the theoretical limit of the axial resolution evaluated as a full-width at half maximum measure of a bit size was 1.4 μm at the fabrication conditions employed.

Original languageEnglish
Pages (from-to)13-15
Number of pages3
JournalApplied Physics Letters
Volume77
Issue number1
Publication statusPublished - 2000 Jul 3
Externally publishedYes

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readout
silicon dioxide
photoluminescence
photons
pulse duration
recording
illumination
lenses
fabrication
scanning
defects
excitation

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

Cite this

Watanabe, M., Juodkazis, S., Sun, H. B., Matsuo, S., & Misawa, H. (2000). Two-photon readout of three-dimensional memory in silica. Applied Physics Letters, 77(1), 13-15.

Two-photon readout of three-dimensional memory in silica. / Watanabe, M.; Juodkazis, S.; Sun, H. B.; Matsuo, Shigeki; Misawa, H.

In: Applied Physics Letters, Vol. 77, No. 1, 03.07.2000, p. 13-15.

Research output: Contribution to journalArticle

Watanabe, M, Juodkazis, S, Sun, HB, Matsuo, S & Misawa, H 2000, 'Two-photon readout of three-dimensional memory in silica', Applied Physics Letters, vol. 77, no. 1, pp. 13-15.
Watanabe M, Juodkazis S, Sun HB, Matsuo S, Misawa H. Two-photon readout of three-dimensional memory in silica. Applied Physics Letters. 2000 Jul 3;77(1):13-15.
Watanabe, M. ; Juodkazis, S. ; Sun, H. B. ; Matsuo, Shigeki ; Misawa, H. / Two-photon readout of three-dimensional memory in silica. In: Applied Physics Letters. 2000 ; Vol. 77, No. 1. pp. 13-15.
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