Effect of broadband incoherent light on the photoresponse of lithium niobate crystals

Syuĭ, A. V.; Stroganov, V. I.; Криштоп, В. В.; Likhtin, V. V.

doi:10.1134/s0030400x08010190

Cited by 4 publications

(3 citation statements)

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“…24 Generally speaking, the observed relaxation has analogy with the light induced slow capacitor charge-discharge-like mechanism that was also reported for other ferroelectric systems. 25 Similarly to the relaxation time, the magnitude of the photoresistance clearly depends on illumination wavelength (for the same light intensity) reaching 1.1% for 365 nm light. Figure 2(c) suggests that the response/relaxation times and the magnitude of photoresistance originate from the photo-induced deformation of the BFO substrate.…”

Section: Controlling the Magnetization Directionmentioning

confidence: 97%

Light controlled magnetoresistance and magnetic field controlled photoresistance in CoFe film deposited on BiFeO3

Kundys

Mény

Gibbs

et al. 2012

Applied Physics Letters

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We present a magnetoresistive—photoresistive device based on the interaction of a piezomagnetic CoFe thin film with a photostrictive BiFeO3 (BFO) substrate that undergoes light-induced strain. The magnitude of the resistance and magnetoresistance in the CoFe film can be controlled by the wavelength of the incident light on the BiFeO3. Moreover, a light-induced decrease in anisotropic magnetoresistance is detected due to an additional magnetoelastic contribution to magnetic anisotropy of the CoFe film. This effect may find applications in photo-sensing systems, wavelength detectors and can possibly open a research development in light-controlled magnetic switching properties for next generation magnetoresistive memory devices.

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Section: Controlling the Magnetization Directionmentioning

confidence: 97%

Light controlled magnetoresistance and magnetic field controlled photoresistance in CoFe film deposited on BiFeO3

Kundys

Mény

Gibbs

et al. 2012

Applied Physics Letters

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“…The observed relaxation for 365-nm light has analogy with the slow capacitor discharge-like mechanism, which was also reported for other ferroelectric systems. 11 The sample typically needs at least approximately 4000 s to completely recover its initial size. The light-induced strain is tensile for all studied wavelengths under the same illumination power.…”

mentioning

confidence: 99%

Wavelength dependence of photoinduced deformation in BiFeO3

et al. 2012

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Optomechanical effects in polar solids result from the combination of two main processes, electric field-induced strain and photon-induced voltages. Whereas the former depends on the electrostrictive ability of the sample to convert electric energy into mechanical energy, the latter is caused by the capacity of photons with appropriate energy to generate charges and, therefore, can depend on wavelength. We report here on mechanical deformation of BiFeO 3 and its response time to discrete wavelengths of incident light ranging from 365 to 940 nm. The mechanical response of BiFeO 3 is found to have two maxima in near-UV and green spectral wavelength regions. DOI: 10.1103/PhysRevB.85.092301 PACS number(s): 78.20.hb, 75.85.+t, 78.20.nc Cross-functional materials, where structure, charge, and magnetism are strongly interrelated, present high interest opportunities to realize new functionalities. In particular, photoelasticity in electrically polar materials is an extraordinary property with valuable remote light-controlled applications. [1][2][3] Due to the spontaneous polarization in polar dielectrics, light-generated charges distribute along the internal electricfield direction, thus changing the total electric field, and can cause sample deformation via the electrostrictive effect. Although some practical devices have been developed, the best response time with typical values of tens of seconds 4 must be improved. In that respect, our recent report on photoelastic effect in BiFeO 3 (BFO) with a fast response time may boost this research direction.5 Moreover, the observed magnetic field dependence can offer additional functionality in future photoelastic-multiferroic devices where strain, magnetization, and polarization can potentially be changed simultaneously by light as well as applied magnetic and electric fields. The BFO is a well-documented magnetic and ferroelectric compound in which both properties have been investigated rather extensively.6 Very interesting recent reports on optical properties in BFO include magnetochromism 7 and photovoltaic effects. 8,9 In this Brief Report, we investigate the wavelength dependence of the photoinduced strain in BFO single crystal for the purpose of finding an optimal cross-operational energy window of this intriguing property. Such measurements can also provide an independent indirect insight into the optical sensitivity of this extraordinary room temperature multiferroic compound.A BFO single crystal with thickness of 90 μm and lateral dimensions in the mm scale, shown on Fig. 1, was used for this study. The sample was selected using polarized light with an optical microscope revealing its single ferroelectric domain state with its spontaneous ferroelectric polarization along the [111] direction in the pseudocubic lattice description.Side 1 of the crystal is flat and reflective, allowing an easy verification of the sample ferroelectric state by polarized light in reflection mode, while side 2 exhibits a significant light absorption and indicates directions of crystal...

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“…Therefore, to creating a PRLS model we need to formulate the conditions for recording of RI gratings on which the light noise amplification is performed. Study of PRLS in LiNbO 3 crystals with various doping admixtures allows insight into the processes taking place in the crystals [4][5][6][7][8][9][10][11][12][13][14].…”

Section: Introductionmentioning

confidence: 99%

Selective Photorefractive Light Scattering in Rh-Doped LiNbO<sub>3</sub> Crystals

Maximenko¹,

Криштоп²

2013

OPJ

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The photorefractive properties of lithium niobate crystals depend strongly on the kind of doping admixture. Study of LiNbO 3 crystals with various doping admixtures using photorefractive light scattering allows insight into the processes taking place in the crystals. This paper presents new experimental results of non-selective and selective photorefractive light scattering investigations into rhodium-doped lithium niobate crystals and proposes a model to explain the experimental data.

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Effect of broadband incoherent light on the photoresponse of lithium niobate crystals

Cited by 4 publications

References 4 publications

Light controlled magnetoresistance and magnetic field controlled photoresistance in CoFe film deposited on BiFeO3

Light controlled magnetoresistance and magnetic field controlled photoresistance in CoFe film deposited on BiFeO3

Wavelength dependence of photoinduced deformation in BiFeO3

Selective Photorefractive Light Scattering in Rh-Doped LiNbO<sub>3</sub> Crystals

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Effect of broadband incoherent light on the photoresponse of lithium niobate crystals

Cited by 4 publications

References 4 publications

Light controlled magnetoresistance and magnetic field controlled photoresistance in CoFe film deposited on BiFeO3

Light controlled magnetoresistance and magnetic field controlled photoresistance in CoFe film deposited on BiFeO3

Wavelength dependence of photoinduced deformation in BiFeO3

Selective Photorefractive Light Scattering in Rh-Doped LiNbO&lt;sub&gt;3&lt;/sub&gt; Crystals

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Selective Photorefractive Light Scattering in Rh-Doped LiNbO<sub>3</sub> Crystals