Holographic and spectroscopic characterization of spiropyran doped poly(methyl methacrylate) films

Xue, Songsheng; Manivannan, Gurusamy; Lessard, Roger A.

doi:10.1016/0040-6090(94)90325-5

Cited by 25 publications

(12 citation statements)

References 13 publications

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“…A loss of 53% of the SP initial absorption for the former and 42% for the later was observed. The possible reason for the observed fatigue level for the PMMA matrix prepared by radical polymerisation could be the chemical reaction of excited SP molecules with either initiator (AIBN) or free macro radicals during the polymerisation [12]. Another possibility is that the stable form of SP in its opened form can be decreased the initial SP molecules in the bleaching process [13].…”

Section: Resultsmentioning

confidence: 99%

“…Such materials typically undergo photoreactions that proceed via electronically excited states causing changes in molecular structure or conformation, thereby altering the UV/visible absorption spectra and refraction index of the sample. 1 ' ,3',3'-Trimethylspiro-8-nitro-2H-1-benzopyran-2' ,2'-indoline, commercially known as Spiropyran, is a strongly photochromic molecule (7)(8)(9), which undergoes the photochemical reaction shown in Figure 1 .The closed form of SP has an absorption band in the UV (between 320 and 400 nm) and is thus colorless. Upon UV irradiation, hetrolytic C-O ring cleavage takes place, leading to the formation of the open zwitterrionic colored forms, which have strong absorption in the visible region (10).…”

Section: Introductionmentioning

confidence: 97%

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Photochromic reaction of spiropyran in polymer matrices

et al. 2000

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The photo excitations of Spiropyran-doped polymer films were studied. Cellulose acetate (CA), commercial ploy(methyl methacrylate) (PMMA) and PMMA prepared by radical polymerisation of MMA, were used as host polymer matrices. The open form of SP presents a maximum of absorption cantered at about 600 nm upon UV irradiation. We have determined the photoreaction rate constants, kuv and k15, for the coloring and bleaching processes. Reversible holographic recording in SPIPMMA films was studied and photochemical fatigue resistance was evaluated upon repeated UVfVisible irradiation cycles. We found a loss of 42, 53 and 74% respectively in PMMA by gravity deposition, PMMA (by polymerisation of MMA) and cellulose acetate films.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 97%

Photochromic reaction of spiropyran in polymer matrices

et al. 2000

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“…Photopolymer recording materials are particularly attractive for holographic recording applications [1][2][3][4][5][6]; compared with inorganic materials, photopolymers can provide larger refractive index modulation, higher sensitivity and better flexibility in terms of composition. In previous studies, we found that 9,10-phenanthrenequinone (PQ)-doped poly(methyl methacrylate) (PMMA) serves as a good recording material for holographic data storage [6][7][8][9].…”

Section: Introductionmentioning

confidence: 99%

Co-doping with polysquaraine enhances the holographic optical data storage of PMMA/PQ photopolymers

Chang

Hsiao

et al. 2011

Journal of Modern Optics

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In this study, we synthesised poly(3-octylpyrrole-co-squaric acid) (PSQ3), a polysquaraine, through the reaction of 3-octylpyrrole and squaric acid, and then co-doped it with phenanthrenequinone (PQ) into poly(methyl methacrylate) (PMMA) to improve the holographic data storage characteristics of the photopolymer. The photopolymers co-doped with relatively small amounts of PSQ3 exhibited greatly improved holographic recording characteristics, including superior diffraction efficiency and dynamic range (M#). Among the samples co-doped with PQ and PSQ3, the maximum diffraction efficiency reached 54.8% (cf. 9.0% for PMMA/PQ) without further downgrade and the value of M# reached 1.05 (cf. 0.46 for PMMA/PQ). Therefore, the holographic data storage characteristics of the photopolymer PMMA/PQ were improved through codoping with PSQ3.

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“…To date, researchers on photochromic optical storage are mostly concentrated on organic photochromic materials. [8][9][10][11][12][13][14] These organic materials suffer a major deficiency of destructive readout.…”

Section: Introductionmentioning

confidence: 99%

Characterization of erasable inorganic photochromic media for optical disk data storage

Huang

Wang

Tsui

et al. 1998

Journal of Applied Physics

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Optical recording characteristics of an ion-exchanged inorganic photochromic media is investigated. The experiments show that the ion-exchanged recording layer can support high data recording density with excellent optical readout contrast. Its recording speed at available red diode laser power can be comparable and even faster than most CD-erasable drives. A focused UV light or electron beams can erase the recorded data on the ion-exchanged layer and facilitate further data rewriting by focused laser beams. The recording medium has excellent thermal stability and supports nondestructive data readout for erasable optical data storage applications.

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Holographic and spectroscopic characterization of spiropyran doped poly(methyl methacrylate) films

Cited by 25 publications

References 13 publications

Photochromic reaction of spiropyran in polymer matrices

Photochromic reaction of spiropyran in polymer matrices

Co-doping with polysquaraine enhances the holographic optical data storage of PMMA/PQ photopolymers

Characterization of erasable inorganic photochromic media for optical disk data storage

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