Green and red laser holographic recording in different glassy azocompounds

Ozols, Andris; Kokars, Valdis; Augustovs, Pēteris; Traskovskis, Kaspars; Maļeckis, Ansis; Mežinskis, Gundars; Plūdons, Artūrs; Saharov, D.

doi:10.1016/j.optmat.2010.01.022

Cited by 13 publications

(11 citation statements)

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“…The effect of recording light polarization on the holographic grating recording efficiency is experimentally studied in a chalcogenide a-As 40 S 15 Se 45 film and compared with the previously obtained results for our best azobenzene molecular glassy film 8a [4] at 633 nm. SDE up to 45% was achieved in sample 8a with − polarizations, whereas in the case of chalcogenide film CE-2 po-…”

Section: Discussionmentioning

confidence: 97%

“…An a-As 40 S 15 Se 45 film of the same size, thermally evaporated onto the glass substrate with band gap wavelength λ = 636 nm and thickness = 2 5 µm (a-As-S-Se film) was also experimentally studied in comparison with azobenzene compound films. Also, the polarization changes in the process of vector diffraction were studied in an a-As 2 S 3 chalcogenide film [λ = 517 nm, = 13 µm (a-As-S film)] and in an LiTaO 3 :Fe ferroelectric crystal (0.10.mass % Fe 2 O 3 , λ = 400 nm, and = 3 75 mm).…”

Section: Samples and Experimentsmentioning

confidence: 99%

“…Recently we have found that quite efficient holographic recording is possible by a red He-Ne laser light in stilbene azobenzene derivatives, including surface relief grating (SRG) recording with a 226 nm thickness change [13][14][15]. The conclusion is, most probably, the azochromophore photodegradation mechanism was responsible for SRG recording, but other mechanisms can contribute as well, including trans-cis photoisomerization and chromophore photoorientation, accompanied by coordinated alignment of adjacent backbone segments and recharging of acceptor states.…”

Section: Introductionmentioning

confidence: 99%

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Effect of light polarization on holographic recording in glassy azocompounds and chalcogenides

et al. 2011

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Abstract:Light polarization effects on a holographic grating recording in a glassy chalcogenide a-As 40 S 15 Se 45 film has been experimentally studied and compared with previously studied glassy molecular azobenzene film 8a at 633, using − − , CE-1 and CE-2 circular-elliptic recording-beam polarizations (differing by light electric field rotation directions). The azocompound exhibited much higher self-diffraction efficiency (SDE) and diffraction efficiency, whereas chalcogenide was more sensitive. Their recording efficiency polarization dependences also were different. SDE up to 45% was achieved in 8a with − and up to 2.6% in a-As 40 S 15 Se 45 with CE-2 polarized recording beams. The polarization changes in the diffraction process were studied as well in these and other materials (11, 16, 19 and a-As 2 S 3 film, LiTaO 3 :Fe crystal). It was found that light polarization changes in the process of diffraction from gratings recorded vectorially by − polarizations depended on chemical composition, wavelength, and exposure time. Vector gratings with SDE up to 25% were recorded in 8a, rotating a linear polarization by 90°. No light polarization changes were found in azobenzene 19 and chalcogenide films and in LiTaO 3 :Fe crystal, thus showing a vector recording of scalar holograms. The recording mechanisms in azocompounds and chalcogenides are discussed and compared. 42.25.Ja, 42.25.Gy, 68.35.bj, 68.35.bm PACS (2008):

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Section: Discussionmentioning

confidence: 97%

Section: Samples and Experimentsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Effect of light polarization on holographic recording in glassy azocompounds and chalcogenides

et al. 2011

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“…Studied azobenzene molecular glasses were synthesized and characterized in our faculty [9]. In this paper the three best of them are described, namely, 8a or 3-(4-(bis(2-(trityloxy)ethyl)amino)phenyl)-2-(4-(2-bromo-4-nitrophenyl) diazenyl)phenyl)acrylonitrile, 11 or 4-((2-bromo-4-nitrophenyl)diazenyl)-N,N-bis(2-(triphenylsilyloxy)ethyl)benzenamine, and 16 or 2-(ethyl (4-((2-nitro-4-triphenyl)diazenyl) phenyl) amino) ethyl-4-((4-bis(2-(trityloxy)ethyl)amino)phenyl) diazenyl)-3-nitrobenzoate.…”

Section: Samples and Experimental Proceduresmentioning

confidence: 99%

Polarization dependence of holographic recording in glassy azocompounds

Ozols¹,

Kokars²,

Augustovs³

et al. 2010

Lithuanian J. Phys.

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Polarization dependence of holographic grating recording in glassy molecular azobenzene films 8a, 11, and 16 has been experimentally studied at 633 and 532 nm with s-s, p-p, CE-1 and CE-2 circular-elliptic (differing by light electric field rotation directions) recording beam polarizations. Samples 8a and 11 with the simplest chemical structure were the most efficient at 633 nm, and sample 8a was the most efficient at 532 nm. Self-diffraction efficiency (SDE) up to 45% was achieved in 8a with p-p polarized recording beams at 633 nm. Linear p-p polarizations were the most efficient at 633 nm whereas CE-1 polarizations were the best at 532 nm. It was found that the light polarization changes in the process of diffraction depend on chemical composition, wavelength, and exposure time. Vector gratings with SDE up to 25% were recorded in 8a rotating a linear polarization by 90• . Mainly erasure of gratings took place with one beam. Coherent self-enhancement of gratings was observed only for s-p and both CE polarizations in 8a at 532 nm and for s-p polarizations at 633 nm. Atomic force microscopy measurements also were made. The evidence is found for trans-cis photoisomerization holographic recording mechanism at both 532 and 633 nm. Studied films can be applied for production of polarization holographic optical elements and for permanent optical information recording.

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“…The synthesis and characterizing data can be found in our previously published papers[7,[12][13][14][15][16].…”

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confidence: 99%

Triphenylmethyl and triphenylsilyl based molecular glasses for photonic applications

Rutkis

Traskovskis

2015

SPIE Proceedings

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Triphenylmethyl and triphenylsilyl structural fragments can be used to obtain glass forming, solution processable materials from polar chromophore molecules. Large number of compounds has been synthesized taking advantage of this approach, making it possible to identify some structure-property relations. Regarding the non-linear optical (NLO) properties of the given materials it is evident that triphenylmethyl groups help shielding unwanted NLO efficiency limiting dipolar interactions between polar chromophores in solid films. Chromophore stacking is still observed for compounds with large dipole momentum values. The glass transition temperatures of the compounds increase with the molecular weight for the studied material class, reaching values up to 130°C.

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Green and red laser holographic recording in different glassy azocompounds

Cited by 13 publications

References 5 publications

Effect of light polarization on holographic recording in glassy azocompounds and chalcogenides

Effect of light polarization on holographic recording in glassy azocompounds and chalcogenides

Polarization dependence of holographic recording in glassy azocompounds

Triphenylmethyl and triphenylsilyl based molecular glasses for photonic applications

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