Influence of surroundings on photorefractive effect in lithium niobate crystals

Tarjányi, Norbert; Turek, Ivan

doi:10.1016/j.physb.2012.07.031

Cited by 3 publications

(3 citation statements)

References 29 publications

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“…about 150 μm and the second exposure at the same conditions finished the process of the waveguide formation (Fig. 5) and the guiding properties were demonstrated [23,24].…”

Section: Discussionmentioning

confidence: 76%

“…4 is induced in the crystal. The spatial distribution of the refractive index was calculated according to the assumptions that: (i) the refractive index changes are dominantly due to electro-optic effect, (ii) the diffusion of the charge carriers is negligibly small and the photogalvanic current is dominantly contributing to the distribution of the charge density, (iii) the crystal is surrounded by an electrically conductive medium [23]. The pattern shown in Fig.…”

Section: Lithium Niobate As a Basis For Integrated Photonicsmentioning

confidence: 99%

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Lithium Niobate-Based Integrated Photonics Utilizing Photorefractive Effect

Tarjányi¹,

Kacik²

2017

Komunikácie

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Lithium niobate (LiNbO 3 ) is an ideal material with many interesting properties for integrated photonics. Despite the rich set of properties the technology of lithium niobate integrated optics has not evolved as much as integrated optics in III-V semiconductors and silicon photonics. Future applications of LiNbO 3 as an integrated optical platform require a technology that can materialize ultracompact and efficient optical circuits on the material. To achieve the goal two possible approaches can be considered: developing of tightly-confined lithium niobate photonic devices and circuits on silicon substrates by hybrid technologies and, developing pure lithium niobate photonic devices employing strong photorefractive effect. The latter approach is in more details discussed in the contribution and concrete examples of practically realized photonic structures are presented.

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“…about 150 μm and the second exposure at the same conditions finished the process of the waveguide formation (Fig. 5) and the guiding properties were demonstrated [23,24].…”

Section: Discussionmentioning

confidence: 76%

Section: Lithium Niobate As a Basis For Integrated Photonicsmentioning

confidence: 99%

Lithium Niobate-Based Integrated Photonics Utilizing Photorefractive Effect

Tarjányi¹,

Kacik²

2017

Komunikácie

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“…Such behaviour was attributed to charge carriers recombination at or near the surface of the crystal originated as consequence of the electric field in the bulk material formed due to its illumination, but no further theoretical treatment confirming the suggestion was performed. The influence of the charges present in the environment surrounding the crystal sample on the refractive index inhomogeneity within the sample was experimentally showed and numerically confirmed for static case in [6].…”

Section: Introductionmentioning

confidence: 75%

The Photorefractive Response of LinbO3:Fe:Mn Crystal Depending on Electrical Properties of its Surroundings

Tarjányi¹

2013

Acta Electrotechnica Et Informatica

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The results of experimental investigation of the impact of ambient surroundings on refractive index inhomogeneity induced in LiNbO 3 :Fe:Mn crystal are presented in the article. The effect of dielectric (ambient air, paraffin oil) and electrically conducting (saturated aqueous solution of CaCl 2) media surrounding the sample was investigated. The refractive index inhomogeneity in the sample was created due to photorefractive effect and monitored in real time by means of Mach-Zehnder interferometer. The time dependences of the amplitude of the induced refractive index changes were obtained from captured interferograms. The analysis of the obtained time dependences shows that the temporal behaviour of the inhomogeneity during and after its formation as well as the spatial distribution of the refractive index within the inhomogeneity depends significantly on electric properties of a medium surrounding the crystal sample.

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Specially shaped negative lens produced in a lithium niobate crystal

Tarjányi

2014

Opt. Eng

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Influence of surroundings on photorefractive effect in lithium niobate crystals

Cited by 3 publications

References 29 publications

Lithium Niobate-Based Integrated Photonics Utilizing Photorefractive Effect

Lithium Niobate-Based Integrated Photonics Utilizing Photorefractive Effect

The Photorefractive Response of LinbO3:Fe:Mn Crystal Depending on Electrical Properties of its Surroundings

Specially shaped negative lens produced in a lithium niobate crystal

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