scholarly journals Effect of Rare-Earth Doping on the Structural and Optical Properties of the Ag3AsS3 Crystals

2021 ◽  
Author(s):  
O.V. Smitiukh ◽  
O.V. Marchuk ◽  
Y.M. Kogut ◽  
V.O. Yukhymchuk ◽  
N.V. Mazur ◽  
...  
Keyword(s):  
Optical Properties ◽  
Rare Earth ◽  
Second Harmonic ◽  
Rare Earth Doping ◽  
Electromagnetic Spectrum ◽  
Non Linear ◽  
Nlo Materials ◽  
Linear Optical ◽  
Rare Earth Doped ◽  
The Rare Earth

Abstract Non-linear optical (NLO) materials allow the production of the coherent laser beam in the difficult frequency ranges of the electromagnetic spectrum. Aiming to explore new classes of the NLO materials with high optical performance in the infrared (IR) region, in this work, we investigated the effect of the rare earth doping (Pr, Eu, Yb) on the crystal structure and optical properties of the Ag3AsS3 crystals. The performed analysis of the XRD patterns indicates that the rare earth elements are located in the Ag sites of the crystal lattice. As a result, the second harmonic generation (SHG) intensity, which determines the effectiveness of the NLO materials, increases with the increase of rare earth dopant content up to 1.0 %. Using the absorption analysis and Raman spectroscopy, we show that the increase in the SHG intensity can be related to the slight decrease of the bandgap, as well as with the increased electron-phonon interaction in rare-earth-doped Ag3AsS3 crystals. Considering the discovered enhancement of the SHG intensity, accompanied by the low melting temperature, this work offers rare-earth-doped Ag3AsS3 crystals as potential candidates for the non-linear optical applications for the infrared frequency range.

NON-LINEAR OPTICAL EFFECTS IN THE RARE-EARTH DOPED OXIDE GLASSES

2002 ◽  
Vol 29 (2-3) ◽  
pp. 99-108 ◽  
Author(s):  
WASYLAK J. ◽  
DOROSZ D. ◽  
IMIOLEK W. ◽  
KRASOWSKI J. ◽  
I. V. KITYK ◽  
...  
Keyword(s):  
Rare Earth ◽  
Oxide Glasses ◽  
Optical Effects ◽  
Non Linear ◽  
Linear Optical ◽  
Rare Earth Doped ◽  
Doped Oxide ◽  
The Rare Earth

scholarly journals L-alaninium perrhenate: crystal structure and non-linear optical properties

2014 ◽  
Vol 12 (10) ◽  
pp. 1016-1022 ◽  
Author(s):  
Vitor Rodrigues ◽  
Maria Costa ◽  
Etelvina Gomes ◽  
Dmitry Isakov ◽  
Michael Belsley
Keyword(s):  
Crystal Structure ◽  
Optical Properties ◽  
Second Harmonic ◽  
Negative Ions ◽  
Damage Threshold ◽  
Linear Optics ◽  
Second Harmonic Generation Efficiency ◽  
Non Linear ◽  
Linear Optical Properties ◽  
Linear Optical

AbstractThe crystal structure and non-linear optical properties of L-alaninium perrhenate, C3H8NO2+ ReO4 −, are reported. The protonated amino acid and the perrhenate anion have their usual geometries. The three-dimensional hydrogen-bonded network can be seen as a stacking of layers parallel to the (100) planes. Each layer is formed by chains of alternating positive and negative ions along the b and c axes. Hydrogen bonding of adjacent layers forms alternating chains along the a axis. A high damage threshold and a second-harmonic generation efficiency three times that of KDP make this new material potentially useful in non-linear optics.

scholarly journals [A3X][Ga3PS8] (A = K, Rb; X = Cl, Br): promising IR non-linear optical materials exhibiting concurrently strong second-harmonic generation and high laser induced damage thresholds

2016 ◽  
Vol 7 (9) ◽  
pp. 6273-6277 ◽  
Author(s):  
Bin-Wen Liu ◽  
Hui-Yi Zeng ◽  
Xiao-Ming Jiang ◽  
Guan-E Wang ◽  
Shu-Fang Li ◽  
...  
Keyword(s):  
Second Harmonic Generation ◽  
Harmonic Generation ◽  
Optical Materials ◽  
Second Harmonic ◽  
High Laser ◽  
Non Linear ◽  
Nlo Materials ◽  
Linear Optical ◽  
Laser Induced Damage

We have developed a new series of salt-inclusion chalcogenides, which are promising IR-NLO materials exhibiting large second-harmonic generation and high laser-induced damage thresholds.

scholarly journals Quantum Confined Stark Effect on the Linear and Nonlinear Optical Properties of SiGe/Si Semi Oblate and Prolate Quantum Dots Grown in Si Wetting Layer

Nanomaterials ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 1513
Author(s):  
Varsha ◽  
Mohamed Kria ◽  
Jawad El Hamdaoui ◽  
Laura M. Pérez ◽  
Vinod Prasad ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Optical Properties ◽  
Quantum Dot ◽  
Electric Field ◽  
Harmonic Generation ◽  
Second Harmonic ◽  
Wetting Layer ◽  
Non Linear ◽  
Linear Optical Properties ◽  
Linear Optical

We have studied the parallel and perpendicular electric field effects on the system of SiGe prolate and oblate quantum dots numerically, taking into account the wetting layer and quantum dot size effects. Using the effective-mass approximation in the two bands model, we computationally calculated the extensive variation of dipole matrix (DM) elements, bandgap and non-linear optical properties, including absorption coefficients, refractive index changes, second harmonic generation and third harmonic generation as a function of the electric field, wetting layer size and the size of the quantum dot. The redshift is observed for the non-linear optical properties with the increasing electric field and an increase in wetting layer thickness. The sensitivity to the electric field toward the shape of the quantum dot is also observed. This study is resourceful for all the researchers as it provides a pragmatic model by considering oblate and prolate shaped quantum dots by explaining the optical and electronic properties precisely, as a consequence of the confined stark shift and wetting layer.

Preparation and Properties of Rare Earth-Doped TiO2 Thin Films by Sol-Gel Process

2014 ◽  
Vol 1033-1034 ◽  
pp. 1235-1238
Author(s):  
Tao Bai ◽  
Shi Gen Zhu
Keyword(s):  
Thin Films ◽  
Rare Earth ◽  
Sol Gel ◽  
Rare Earth Doping ◽  
X Ray Diffraction ◽  
X Ray ◽  
Sol Gel Process ◽  
Scanning Electronmicroscopy ◽  
Rare Earth Doped ◽  
The Rare Earth

Rare earth doped titaniumdioxide (TiO2) thin films (rare earth-doped TiO2) have been successfully prepared on a glass substrate by a sol–gel route. After the rare earth-doped TiO2thin films were calcined at 773K for 1h, the effect of rare earth-doping on the properties were investigated using X-ray diffraction (XRD), scanning electronmicroscopy (SEM), ultraviolet–visible spectroscopy and thermogravimetric techniques (TG/DTG). The XRD results showed that rare earth-doped TiO2thin films contained only a single crystalline phase of anatase TiO2after calcining at 773K for 1h. SEM micrographs showed that rare earth-doped TiO2thin films have smooth surfaces containing granular nanocrystallines and are without cracks. The UV–vis absorption spectra showed that the absorption of the rare earth-doped TiO2thin films has a red-shift. From ambient to 1273K, it is about 12% of mass loss because of the volatilizing of water and organic and the phase transformation.

Synthesis, structure and non-linear optical properties of new isostructural β-D-fructopyranose alkaline halide metal–organic frameworks: a theoretical and an experimental study

2017 ◽  
Vol 73 (4) ◽  
pp. 737-743 ◽  
Author(s):  
Domenica Marabello ◽  
Paola Antoniotti ◽  
Paola Benzi ◽  
Carlo Canepa ◽  
Leonardo Mortati ◽  
...  
Keyword(s):  
Optical Properties ◽  
Second Harmonic ◽  
Theoretical Calculations ◽  
Metal Organic Framework ◽  
X Ray Diffraction ◽  
Intrinsic Nature ◽  
Non Linear ◽  
Metal Organic ◽  
Linear Optical Properties ◽  
Linear Optical

In this work four metal–organic framework isomorphs, based on fructose and alkali-earth halogenides, were investigated to better understand the effect of the size of the cation and the different polarizability of the anion on the calculated hyperpolarizability and optical susceptibility, which are correlated to non-linear optical properties. The compounds were characterized by X-ray diffraction and the first hyperpolarizability and the second-order susceptibility were obtained from theoretical calculations. Furthermore, a new method to measure the second-harmonic (SH) efficiency on a small quantity of powder at different wavelengths of excitation was optimized and an attempt was made to assess the reduction of the SH intensity for small quantities of nano-crystals, in order to ascertain the possibility of applications in biological systems. The results of this work show that both the intrinsic nature of the anion and the induced dissociation of cations and anions by fructose play a role in the second-harmonic generating properties of such compounds.

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