Use of two-photon absorption in a photorefractive crystal for three-dimensional optical memory

Kawata, Yoshimasa; Ishitobi, Hidekazu; Kawata, Satoshi

doi:10.1364/ol.23.000756

Cited by 128 publications

(62 citation statements)

References 9 publications

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“…The situation, however, can be improved by employing simultaneous two-photon absorption (2PA) to promote molecular excitation. 2PA has been applied to a large number of applications, such, for instance, two-photon polymerization, 5 three-dimensional optical data storage, 6 fluorescence excitation microscopy, 7,8 optical limiting, 9, 10 and two-photon photodynamic therapy. 8,11 Molecules that undergo 2PA, when exposed to intense light sources, reach a final state where a) Author to whom correspondence should be addressed.…”

Section: Introductionmentioning

confidence: 99%

Experimental and theoretical study of two-photon absorption in nitrofuran derivatives: Promising compounds for photochemotherapy

Boni

Corrêa

Silva

et al. 2011

The Journal of Chemical Physics

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We determine the two-photon absorption cross-section for both compounds, from 560 to 880 nm, which present peak values of 64 GM for quinifuryl and 20 GM for nitrofurantoine (1 GM = 1 ×10 −50 cm 4 .s.photon −1 ). Besides, theoretical calculations employing the linear and quadratic response functions were carried out at the density functional theory level to aid the interpretations of the experimental results. The theoretical results yielded oscillator strengths, two-photon transition probabilities, and transition energies, which are in good agreement with the experimental data. A higher number of allowed electronic transitions was identified for quinifuryl in comparison to nitrofurantoine by the theoretical calculations. Due to the planar structure of both compounds, the differences in the two-photon absorption cross-section values are a consequence of their distinct conjugation lengths.

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Section: Introductionmentioning

confidence: 99%

Experimental and theoretical study of two-photon absorption in nitrofuran derivatives: Promising compounds for photochemotherapy

Boni

Corrêa

Silva

et al. 2011

The Journal of Chemical Physics

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“…Many efforts have been made to realize three-dimensional (3D) optical storage in recent years for their potential applications to high density optical data memories [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20]. Femtosecond (fs) laser pulse is a prospective tool for 3D fabrication since the ultrashort pulse duration and extremely high local intensity make it possible to fabricate 3D structures of sub-wavelength scale even in transparent materials through multi-photon absorption, and the photomodified region can be well defined due to the non-thermal nature of the light-matter interaction [13][14][15][16][17][18][19][20].…”

Section: Introductionmentioning

confidence: 99%

Femtosecond laser induced photoluminescence in poly(methyl methacrylate) and three-dimensional optical storage

Nie

Lim

Lee

et al. 2011

Journal of Luminescence

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“…To overcome this problem, an approach based on the use of the multiphoton excitation effect has been reported by several authors. [1][2][3] In the multiphoton excitation process, since the excitation rate is proportional to the square or higher order of the incident intensity, the resolution of the data bits and the level of interlayer crosstalk are greatly improved.…”

Section: Introductionmentioning

confidence: 99%

Multilayer optical storage disk based on the frequency up-conversion effect from rare-earth ions

Ho¹,

Wong²,

Wu³

2003

Opt. Eng.

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We present a multilayered optical storage disk design based on the use of frequency up-conversion in rare earth. This design offers the potential of increased optical storage density. In our experiment, a three-layered sample is prepared by stacking three sections of a thin glass slide on which stripes of Ho 3ϩ /Yb 3ϩ codoped TeO 2 are deposited via a sol-gel technique. The layers are selectively illuminated by a focused 980-nm laser beam by bringing them into the focal plane. The up-converted green luminescence signals from the tracks in the three layers are clearly resolved without any observable interlayer crosstalk, thus demonstrating the successful data retrieval from our multilayered optical disk. Based on the nonlinear property associated with the upconversion effect, we also perform a theoretical calculation on the bit resolution enhancement in relation to the number of photons involved in the up-conversion process. The use of laser heating to induce phase change from an amorphous state to a polycrystalline one in the sol-gel film for write-once-read-many optical storage is also discussed.

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Use of two-photon absorption in a photorefractive crystal for three-dimensional optical memory

Cited by 128 publications

References 9 publications

Experimental and theoretical study of two-photon absorption in nitrofuran derivatives: Promising compounds for photochemotherapy

Experimental and theoretical study of two-photon absorption in nitrofuran derivatives: Promising compounds for photochemotherapy

Femtosecond laser induced photoluminescence in poly(methyl methacrylate) and three-dimensional optical storage

Multilayer optical storage disk based on the frequency up-conversion effect from rare-earth ions

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