Second-Harmonic Generation in Thermally Poled Na2O-Al2O3-TeO2 Glasses

Tellurite glasses exhibit attractive optical properties such as high refractive index, high transmittance in the infrared-to-visible region, and large third-order nonlinear susceptibility. Poled tellurite glasses also show second-harmonic generation (SHG) as revealed by the present authors. However, there exist many unresolved problems in second-harmonic generation of oxide glasses; SH intensity is low and it decays at room temperature. In this work, the effect of Al2O3 addition on SH intensity and its decay has been explored for thermally poled sodium tellurite glasses. The decay rate of SH intensity is reduced by the addition of Al2O3. The result is similar to those reported for phosphate and silicate glasses containing Al2O3. Also, the glasses poled at a voltage of 4 kV manifest optimum poling temperature lower than that for the same glasses poled at 3 kV.

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Enhancement of second harmonic generation using a novel asymmetric metal–graphene–insulator–metal plasmonic waveguide

Journal of Nonlinear Optical Physics & Materials ◽

10.1142/s0218863518500030 ◽

2018 ◽

Vol 27 (01) ◽

pp. 1850003 ◽

Cited By ~ 1

Author(s):

Mohamadreza Soltani

Keyword(s):

Second Harmonic Generation ◽

Harmonic Generation ◽

Nonlinear Optical ◽

Second Harmonic ◽

Field Enhancement ◽

The Other ◽

Nonlinear Susceptibility ◽

Optical Process ◽

Large Enhancement ◽

Nonlinear Optical Process

Here, we propose a novel plasmonic structure, called asymmetric plasmonic nanocavity grating (APNCG), which is shown to dramatically enhance nonlinear optical process of second harmonic generation (SHG). The proposed structure consists of two different metals on both sides of lithium niobate and a thin layer of graphene. By using two different metals the nonlinear susceptibility of the waveguide would be increased noticeably causing to increase SHG. On the other hand, it consists of two identical gratings on one side. By two identical gratings, the pump beam is coupled to two opposing SPP waves, which interfere with each other and result in SPP standing wave in the region between the two gratings. The distance between two gratings will be optimized to reach the highest SHG. It will be shown that by optimizing the geometry of proposed structure and using different metals, field enhancement in APNCG waveguides can result in large enhancement of SHG.

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Second harmonic generation from thermally poled CdS microcrystal-containing glasses

Journal of Non-Crystalline Solids ◽

10.1016/s0022-3093(00)00402-6 ◽

2001 ◽

Vol 281 (1-3) ◽

pp. 198-204 ◽

Cited By ~ 13

Author(s):

Yoshitsugu Yamamoto ◽

Hiroyuki Nasu ◽

Tadanori Hashimoto ◽

Kanichi Kamiya

Keyword(s):

Second Harmonic Generation ◽

Harmonic Generation ◽

Second Harmonic ◽

Thermally Poled

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Second Harmonic Generation from Thermally Poled Ge-S Glass System

Journal of the Ceramic Society of Japan ◽

10.2109/jcersj.113.728 ◽

2005 ◽

Vol 113 (1323) ◽

pp. 728-732 ◽

Cited By ~ 7

Author(s):

Yukari NAKANE ◽

Hiroyuki NASU ◽

Jong HEO ◽

Tadanori HASHIMOTO ◽

Kanichi KAMIYA

Keyword(s):

Second Harmonic Generation ◽

Harmonic Generation ◽

Second Harmonic ◽

Glass System ◽

Thermally Poled

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Synthesis, Growth and Characterization of New Promising Organic Non-Linear Optical Crystal: L-Alanine Alaninium Nitrate

Asian Journal of Chemistry ◽

10.14233/ajchem.2019.21945 ◽

2019 ◽

Vol 31 (8) ◽

pp. 1661-1666

Author(s):

G. Krishnamoorthi ◽

R. Uvarani

Keyword(s):

Second Harmonic Generation ◽

Harmonic Generation ◽

Second Harmonic ◽

Visible Region ◽

Potassium Dihydrogen Phosphate ◽

Dihydrogen Phosphate ◽

Dielectric Study ◽

Second Harmonic Generation Efficiency ◽

Cell Parameters ◽

Induced Defects

A relative study on pure L-alanine alaninium nitrate (LAAN) single crystals and doped with lanthanum oxide, urea and glycine were developed from fluid solution by slow evaporation strategy at room temperature. X-ray diffraction result reveals that LAAN crystallites with system with space bunch P21 and cell parameters a = 7.836 Å, b = 5.428 Å, c = 12.809 Å and β = 94.25°. These parameters were marginally changes for doped crystals compared to pure LAAN crystal. The UV results recommend that the great transmission property of the doped LAAN crystal within the whole visible region guarantees its reasonableness for second harmonic generation applications. The presence of dopants within the LAAN crystal was further affirmed through ICP studies. The functional groups were analyzed through Fourier change infrared spectra investigation. The microhardness and dielectric study at 100 Hz was found to be broadly higher than that of pristine LAAN. The AC conductivity was found to extend after doping due to the induced defects in crystal lattice. The grown crystals were also subjected to second harmonic generation efficiency tests and it was found to be La2O3 doped LAAN crystal is 2.8 times greater than that of potassium dihydrogen phosphate (KDP).

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