Crosstalk in photoluminescence readout of three-dimensional memory in vitreous silica by one- and two-photon excitation

Mitsuru Watanabe, Saulius Juodkazis, Shigeki Matsuo, Junji Nishii, Hiroaki Misawa

Research output: Contribution to journalArticle

14 Citations (Scopus)

Abstract

We report the readout of three-dimensional (3-D) memory of bits from their photoluminescence (PL). The bits were recorded inside vitreous silica by optical damage (micro-explosion), which was induced by 150fs single pulse irradiation at the focal point. The bit can be written by 0.2-0.5 μJ energy pulses at 400 nm or 800 nm (the pulse energy was given at the irradiation point and had an intensity of about 1015W/cm2 when a high numerical aperture of NA = 1.3 objective lens was used for recording). The readout was obtained by the PL of the 3-D pattern of damaged bits, which were excited by quasi-continuos (repetition rate of 82 MHz) fs-irradiation at much lower pulse intensity (by a factor of 106) in order to exclude secondary damage. The readout was performed by the oil-immersion objective lens of NA = 1.3. The wavelength of PL excitation was 400 nm for one-photon and 800 nm for two-photon excitation of PL with the single pulse energy of less than 1 pJ. We found that the crosstalk of PL readout is the same as that for the transmission imaging and measures 4 μm in the inter-plane distance for the case of one-photon excitation and can be reduced to 3 μm when a reflection-type readout system is used together with two-photon excitation (theoretical axial bit size for fabrication of a given optics was 1.4 μm). Two-photon readout of 3-D memory in silica is demonstrated for the first time.

Original languageEnglish
Pages (from-to)6763-6767
Number of pages5
JournalJapanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers
Volume39
Issue number12 A
Publication statusPublished - 2000 Dec 1
Externally publishedYes

Fingerprint

Fused silica
Crosstalk
crosstalk
readout
Photoluminescence
Photons
silicon dioxide
photoluminescence
Data storage equipment
photons
excitation
Irradiation
pulses
Lenses
irradiation
Readout systems
lenses
damage
Explosions
numerical aperture

Keywords

  • Defects in glass
  • Femtosecond laser fabrication
  • Optical properties
  • Photoluminescence
  • Three-dimensional optical data storage
  • Vitreous silica

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

Cite this

Crosstalk in photoluminescence readout of three-dimensional memory in vitreous silica by one- and two-photon excitation. / Watanabe, Mitsuru; Juodkazis, Saulius; Matsuo, Shigeki; Nishii, Junji; Misawa, Hiroaki.

In: Japanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers, Vol. 39, No. 12 A, 01.12.2000, p. 6763-6767.

Research output: Contribution to journalArticle

@article{d37980bd46c64348994a78f30713ab07,
title = "Crosstalk in photoluminescence readout of three-dimensional memory in vitreous silica by one- and two-photon excitation",
abstract = "We report the readout of three-dimensional (3-D) memory of bits from their photoluminescence (PL). The bits were recorded inside vitreous silica by optical damage (micro-explosion), which was induced by 150fs single pulse irradiation at the focal point. The bit can be written by 0.2-0.5 μJ energy pulses at 400 nm or 800 nm (the pulse energy was given at the irradiation point and had an intensity of about 1015W/cm2 when a high numerical aperture of NA = 1.3 objective lens was used for recording). The readout was obtained by the PL of the 3-D pattern of damaged bits, which were excited by quasi-continuos (repetition rate of 82 MHz) fs-irradiation at much lower pulse intensity (by a factor of 106) in order to exclude secondary damage. The readout was performed by the oil-immersion objective lens of NA = 1.3. The wavelength of PL excitation was 400 nm for one-photon and 800 nm for two-photon excitation of PL with the single pulse energy of less than 1 pJ. We found that the crosstalk of PL readout is the same as that for the transmission imaging and measures 4 μm in the inter-plane distance for the case of one-photon excitation and can be reduced to 3 μm when a reflection-type readout system is used together with two-photon excitation (theoretical axial bit size for fabrication of a given optics was 1.4 μm). Two-photon readout of 3-D memory in silica is demonstrated for the first time.",
keywords = "Defects in glass, Femtosecond laser fabrication, Optical properties, Photoluminescence, Three-dimensional optical data storage, Vitreous silica",
author = "Mitsuru Watanabe and Saulius Juodkazis and Shigeki Matsuo and Junji Nishii and Hiroaki Misawa",
year = "2000",
month = "12",
day = "1",
language = "English",
volume = "39",
pages = "6763--6767",
journal = "Japanese Journal of Applied Physics, Part 1: Regular Papers & Short Notes",
issn = "0021-4922",
publisher = "Japan Society of Applied Physics",
number = "12 A",

}

TY - JOUR

T1 - Crosstalk in photoluminescence readout of three-dimensional memory in vitreous silica by one- and two-photon excitation

AU - Watanabe, Mitsuru

AU - Juodkazis, Saulius

AU - Matsuo, Shigeki

AU - Nishii, Junji

AU - Misawa, Hiroaki

PY - 2000/12/1

Y1 - 2000/12/1

N2 - We report the readout of three-dimensional (3-D) memory of bits from their photoluminescence (PL). The bits were recorded inside vitreous silica by optical damage (micro-explosion), which was induced by 150fs single pulse irradiation at the focal point. The bit can be written by 0.2-0.5 μJ energy pulses at 400 nm or 800 nm (the pulse energy was given at the irradiation point and had an intensity of about 1015W/cm2 when a high numerical aperture of NA = 1.3 objective lens was used for recording). The readout was obtained by the PL of the 3-D pattern of damaged bits, which were excited by quasi-continuos (repetition rate of 82 MHz) fs-irradiation at much lower pulse intensity (by a factor of 106) in order to exclude secondary damage. The readout was performed by the oil-immersion objective lens of NA = 1.3. The wavelength of PL excitation was 400 nm for one-photon and 800 nm for two-photon excitation of PL with the single pulse energy of less than 1 pJ. We found that the crosstalk of PL readout is the same as that for the transmission imaging and measures 4 μm in the inter-plane distance for the case of one-photon excitation and can be reduced to 3 μm when a reflection-type readout system is used together with two-photon excitation (theoretical axial bit size for fabrication of a given optics was 1.4 μm). Two-photon readout of 3-D memory in silica is demonstrated for the first time.

AB - We report the readout of three-dimensional (3-D) memory of bits from their photoluminescence (PL). The bits were recorded inside vitreous silica by optical damage (micro-explosion), which was induced by 150fs single pulse irradiation at the focal point. The bit can be written by 0.2-0.5 μJ energy pulses at 400 nm or 800 nm (the pulse energy was given at the irradiation point and had an intensity of about 1015W/cm2 when a high numerical aperture of NA = 1.3 objective lens was used for recording). The readout was obtained by the PL of the 3-D pattern of damaged bits, which were excited by quasi-continuos (repetition rate of 82 MHz) fs-irradiation at much lower pulse intensity (by a factor of 106) in order to exclude secondary damage. The readout was performed by the oil-immersion objective lens of NA = 1.3. The wavelength of PL excitation was 400 nm for one-photon and 800 nm for two-photon excitation of PL with the single pulse energy of less than 1 pJ. We found that the crosstalk of PL readout is the same as that for the transmission imaging and measures 4 μm in the inter-plane distance for the case of one-photon excitation and can be reduced to 3 μm when a reflection-type readout system is used together with two-photon excitation (theoretical axial bit size for fabrication of a given optics was 1.4 μm). Two-photon readout of 3-D memory in silica is demonstrated for the first time.

KW - Defects in glass

KW - Femtosecond laser fabrication

KW - Optical properties

KW - Photoluminescence

KW - Three-dimensional optical data storage

KW - Vitreous silica

UR - http://www.scopus.com/inward/record.url?scp=0034472062&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0034472062&partnerID=8YFLogxK

M3 - Article

AN - SCOPUS:0034472062

VL - 39

SP - 6763

EP - 6767

JO - Japanese Journal of Applied Physics, Part 1: Regular Papers & Short Notes

JF - Japanese Journal of Applied Physics, Part 1: Regular Papers & Short Notes

SN - 0021-4922

IS - 12 A

ER -