Surface relief formation in Ge5As37S58–Se nanomultilayers

Stronski, A.; Achimova, E.; Paiuk, A.; Abaskin, V.; Meshalkin, A.; Prisacar, A.; Triduh, G.; Lytvyn, O. S.

doi:10.1016/j.jnoncrysol.2014.11.010

Cited by 21 publications

(10 citation statements)

References 15 publications

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“…They are considered as typical glasses for infrared applications [3,4] and provide good candidates for photo-structural optical recording [5], acousto-optic devices [6,7] and advanced IR optical fibers [8]. They also provide solid-state physicists with new solutions for the challenging fundamental problems that relate to the possible technological applications for these glasses [7,9].…”

Section: Introductionmentioning

confidence: 99%

Analysis of chemical ordering and fragility for Ge–Se–In glasses

et al. 2015

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Decreasing the band gap of a material due to metal impurities has been approved through several studies, and this subject is considered as a major area of interest within the optoelectronic applications. Indium-based chalcogenides have been considered good candidates in nonlinear optics due to their ability to transmit in the infrared region. Hence, Ge 18 Se 82 has been alloyed with In. The nature of the chemical ordering of amorphous samples of Ge 18 Se 82-x In x (x = 0, 2, 4 and 6) have been systematically studied. The aim of present investigation is to understand the role of chemical composition and meancoordination number in determining their structural and physical properties. The compactness, d, of alloyed samples has been calculated from their measured densities, and values obtained have been interpreted using the topological model proposed to describe the atomic arrangements in these alloys. The variation of the glass transition temperature, T g , with the average coordination number, Z, has been investigated. The compositional dependence of the mean atomic volume, V m , has also been determined. The free volume percentage, FVP, in Ge 18 Se 82-x In x amorphous samples and their fragility indices, m, have been determined to examine the relationship with the mean-coordination number. We have also analyzed the obtained results on the basis of average single bond energy and electronegativity.

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Section: Introductionmentioning

confidence: 99%

Analysis of chemical ordering and fragility for Ge–Se–In glasses

et al. 2015

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“…ChG As 2 S 3 -Se NML was produced by a computer controlled cyclic thermal vacuum deposition through the mask [11]. The technology enables film deposition control within the whole sample thicknesses in the range from 0.005 µm to 3.0 µm.…”

Section: Theory and Experimental Setupmentioning

confidence: 99%

“…1. Here the microscope objective (9) projects the object on the CCD-plane (11). In this way we arrive to the so-called image-plane holography, where the object image is reconstructed at the sensor plane.…”

Section: Theory and Experimental Setupmentioning

confidence: 99%

Noise minimised high resolution digital holographic microscopy applied to surface topography

Achimova¹,

Abaskin²,

Claus³

et al. 2018

Computer Optics

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The topography of surface relief gratings was studied by digital holographic microscopy. The applicability of the method for quantitative measurements of surface microstructure at nanoscale was demonstrated. The method for wavefront reconstruction of surface relief from a digital hologram recorded in off-axis configuration was also applied. The main feature is noise filtration due to the presence of noise in the recorded intensity distribution and the use of all orders of the hologram. Reconstruction results proved a better effectiveness of our approach for topography studying of relief grating patterned on a ChG As2S3 – Se nanomultilayers in comparison with standard Fourier Transform and Atom Force Microscope methods.

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“…Non-linear optics describes the behavior of light in non-linear media, the media in which dielectric polarization responds non-linearly to the electric field. Third order optical non-linearities (χ (3) ) cover a diverse area of non-linear optics. χ (3) describes the third harmonic generation and intensity dependence of the refractive index.…”

Section: Third Order Non-linear Optical Susceptibilitymentioning

confidence: 99%

“…These glasses show different phenomena like photoluminescence, photo-darkening, photo-bleaching and change in phase (amorphous↔crystalline). Due to these phenomena, these materials become potential candidates for various technological applications such as: fiber optics [1], IR-sensors [2], holographic grating [3], non-linear optical devices [4], memory switching [5], optical data storage and phase change random access memory applications [6,7].…”

Section: Introductionmentioning

confidence: 99%

Linear and non-linear optical properties of Ag-doped Ge₂Sb₂Te₅thin films estimated by single transmission spectra

Singh

Sharma

et al. 2017

Semicond. Sci. Technol.

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In this paper we have studied the effect of Ag addition on linear and non-linear optical properties of thermally evaporated (Ge 2 Sb 2 Te 5 ) 100−x Ag x (x=0, 1, 3 and 10) thin films (thickness ∼700 nm) from single transmission spectra. Energy dispersive spectroscopy, x-ray diffraction and Raman spectroscopy were used to verify the composition, amorphous nature and structure of the fabricated thin films respectively. Swanpoel's method was used to calculate the thickness (d), refractive index (n) and extinction coefficient (k). The refractive index and extinction coefficient were used to obtain all linear and non linear optical parameters. The compositional dependence of the refractive index, extinction coefficient, volume energy loss function, surface energy loss function, dielectric constant, dielectric loss function, optical conductivity and third order nonlinear optical susceptibility were determined. All these optical parameters have minimum values for 3% Ag-doped Ge 2 Sb 2 Te 5 (GST). The decrease in measured optical parameters up to 3% Ag doping is due to a decrease in the density of localized states in the mobility gap. The increase in the optical parameters at 10% Ag doping was ascribed to the distortion of the host lattice, because incorporation of Ag has been done at the expense of Ge, Sb and Te. The optical parameters of the GST films were found to be strongly dependent upon Ag content. The results revealed that 3% Ag-doped GST is a promising candidate for phase change optical storage applications.

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Surface relief formation in Ge5As37S58–Se nanomultilayers

Cited by 21 publications

References 15 publications

Analysis of chemical ordering and fragility for Ge–Se–In glasses

Analysis of chemical ordering and fragility for Ge–Se–In glasses

Noise minimised high resolution digital holographic microscopy applied to surface topography

Linear and non-linear optical properties of Ag-doped Ge₂Sb₂Te₅thin films estimated by single transmission spectra

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Surface relief formation in Ge5As37S58–Se nanomultilayers

Cited by 21 publications

References 15 publications

Analysis of chemical ordering and fragility for Ge–Se–In glasses

Analysis of chemical ordering and fragility for Ge–Se–In glasses

Noise minimised high resolution digital holographic microscopy applied to surface topography

Linear and non-linear optical properties of Ag-doped Ge2Sb2Te5thin films estimated by single transmission spectra

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Product

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Linear and non-linear optical properties of Ag-doped Ge₂Sb₂Te₅thin films estimated by single transmission spectra