Photorefractive effect generated in sillenite crystals by picosecond pulses and comparison with the quasi-continuous regime

Pauliat, Gilles; Roosen, Gérald

doi:10.1364/josab.7.002259

Cited by 45 publications

(13 citation statements)

References 18 publications

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“…The framework of the Bi 12 GeO 20 structure is formed by the [BiO 5 E] polyhedra (E= 6s 2 is the non-shared electron pair of Bi) which form dimers by means of a common edge [4]. The Bi 12 GeO 20 has considerable applications due to its photoconduction, photochromism, photorefractive and other properties [5][6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Study on photoluminescence of thermally treated Bi12GeO20 and Mo:Bi12GeO20 crystals

Tang

et al. 2011

Sci. China Technol. Sci.

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Photoluminescence (PL) of Bi 12 GeO 20 and Mo doped Bi 12 GeO 20 (Mo: Bi 12 GeO 20 ) crystals in visible and near-infrared (NIR) spectral regions were studied. X-ray diffraction analysis, absorption and Raman scattering spectra of these crystals were also measured. Pure Bi 12 GeO 20 after annealing in N 2 atmosphere at 450 ºC and 550 °C show predominant emissions at about 745 and 1250 nm bands, while the emission peaks of Mo:Bi 12 GeO 20 crystals untreated or after annealing in Ar at 300 °C are at around 538 and 1165 nm. The results suggest that annealing induces intrinsic luminescence of Bi in pure Bi 12 GeO 20 at room temperature and Mo influences the luminescence centers of Bi 12 GeO 20.

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Section: Introductionmentioning

confidence: 99%

Study on photoluminescence of thermally treated Bi12GeO20 and Mo:Bi12GeO20 crystals

Tang

et al. 2011

Sci. China Technol. Sci.

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“…However, transition from the low-intensity (long-pulse) to high-intensity (short-pulse) experiments brings the response time / I ÿ1 p into the mks region [16,17] and makes the speed parameters competitive with those of the EIT schemes.…”

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confidence: 99%

Light Pulse Slowing Down up to 0.025 cm/s by Photorefractive Two-Wave Coupling

et al. 2003

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It is shown experimentally and theoretically that photorefractive wave coupling can be used for dramatic (< or approximately 0.025 cm/s) deceleration of light pulses whose width is larger than (or comparable with) the nonlinear response time. This classical nonlinear scheme exhibits similarities with the technique based on the quantum effect of electromagnetically induced transparency. The main distinctive feature of our scheme is amplification of the delayed output pulse. Advantages of the novel technique and its prospects for manipulation with light photons are discussed.

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“…The samples were made by sandwitching 200 jim thick pellets between two ITO covered glass plates by heating above the glass transition temperature. The phase shift ofthe photorefractive gratings in these samples was the same as in the casted ones, indicating that no strange artifacts are In transient photorefractivity experiments, an interference pattern from two pico or nanosecond laser pulses creates a sinusoidal distribution of mobile carriers, which drifts under the influence of a strong dc electric field [10,11]. As charge separation advances, a space charge field builds up that can be probed with a cw laser beam through the electrooptic effect.…”

Section: Methodsmentioning

confidence: 76%

<title>Charge trapping in photorefractive polymers</title>

Malliaras

Krasnikov

Bolink

et al. 1995

Xerographic Photoreceptors and Photorefractive Polymers

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Modification of the trap density of the photorefractive polymer composite poly(N-vinyl carbazole) (PVK), 2,4,7-trinitro-9-fluorenone (TNF) and N,N-diethyl-para-nitroaniline (EPNA) is achieved with the addition of4-(diethylamino)benzaldehyde diphenythydrazone (DEH). Measurements of the response time and the phase shift of the photorefractive gratings indicate that at low concentrations DEH acts as a trap, while at higher concentrations a new charge transport pathway through hopping between DEll molecules is established. The transient behaviour of these gratings further supports this picture.

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Photorefractive effect generated in sillenite crystals by picosecond pulses and comparison with the quasi-continuous regime

Cited by 45 publications

References 18 publications

Study on photoluminescence of thermally treated Bi12GeO20 and Mo:Bi12GeO20 crystals

Study on photoluminescence of thermally treated Bi12GeO20 and Mo:Bi12GeO20 crystals

Light Pulse Slowing Down up to 0.025 cm/s by Photorefractive Two-Wave Coupling

<title>Charge trapping in photorefractive polymers</title>

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