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 |
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Pages (from-to) | 3957-3959 |
Number of pages | 3 |
Journal | Applied Physics Letters |
Volume | 74 |
Issue number | 26 |
DOIs | |
Publication status | Published - 1999 Jun 28 |
Externally published | Yes |
ASJC Scopus subject areas
- Physics and Astronomy (miscellaneous)