Intrinsic Helical Twist and Chirality in Ultrathin Tellurium Nanowires

Nanoscale ◽  
2021 ◽  
Author(s):  
Alejandra Londono-Calderon ◽  
Darrick Williams ◽  
Matthew M Schneider ◽  
Benjamin H Savitzky ◽  
Colin Ophus ◽  
...  
Keyword(s):  
Second Harmonic Generation ◽  
Circular Polarization ◽  
Harmonic Generation ◽  
Second Harmonic ◽  
One Dimensional ◽  
Helical Twist ◽  
The One ◽  
Tellurium Nanowires ◽  
Meso Scale

Robust atomic-to-meso-scale chirality is now observed in the one-dimensional form of tellurium. This enables a large and counter-intuitive circular-polarization dependent second harmonic generation response above 0.2 which is not present...

scholarly journals THE DISORDERING EFFECT ON THE ONE-DIMENSIONAL APPERIODIC OPTICAL SUPER-LATTICE IN MULTI-FREQUENCY SHG

2012 ◽  
Vol 15 ◽  
pp. 191-196 ◽  
Author(s):  
MAJID NEMATI
Keyword(s):  
Second Harmonic Generation ◽  
Harmonic Generation ◽  
Second Harmonic ◽  
One Dimensional ◽  
Optical Superlattice ◽  
Super Lattice ◽  
Output Efficiency ◽  
The One ◽  
Aperiodic Crystals ◽  
Random Fluctuations

A multi-frequency second harmonic generation (SHG) in one dimensional nonlinear aperiodic optical superlattice in the presence of linear spacers is considered. The effect of random fluctuations in the length of each layer on the output efficiency of SHG process is investigated, and the favorable percentage of fluctuation in the fabrication of aperiodic optical superlattice is obtained. Comparing perfect and fluctuated aperiodic structures, the researcher realized the decrease in the amount of output efficiency with the increase of fluctuation in the linear-nonlinear aperiodic crystals.

Ba2Ge2Te5: a ternary NLO-active telluride with unusual one-dimensional helical chains and giant second-harmonic-generation tensors

2021 ◽  
Author(s):  
Mao-Yin Ran ◽  
Zuju Ma ◽  
Xintao Wu ◽  
Hua Lin ◽  
Qi-Long Zhu
Keyword(s):  
Second Harmonic Generation ◽  
Harmonic Generation ◽  
Nonlinear Optical ◽  
Second Harmonic ◽  
Metal Chalcogenides ◽  
One Dimensional

The class of non-centrosymmetric (NCS) metal chalcogenides is the most favorable candidates for promising nonlinear optical (NLO) crystals in the infrared (IR) band. However, most research achievements pay them attention...

Pulsed second-harmonic generation in nonlinear, one-dimensional, periodic structures

1997 ◽  
Vol 56 (4) ◽  
pp. 3166-3174 ◽  
Author(s):  
M. Scalora ◽  
M. J. Bloemer ◽  
A. S. Manka ◽  
J. P. Dowling ◽  
C. M. Bowden ◽  
...  
Keyword(s):  
Second Harmonic Generation ◽  
Harmonic Generation ◽  
Periodic Structures ◽  
Second Harmonic ◽  
One Dimensional

scholarly journals Na4Yb(CO3)3F: A New UV Nonlinear Optical Material with a Large Second Harmonic Generation Response

Crystals ◽  
2018 ◽  
Vol 8 (10) ◽  
pp. 381
Author(s):  
Qiaoling Chen ◽  
Min Luo ◽  
Chensheng Lin
Keyword(s):  
Second Harmonic Generation ◽  
Harmonic Generation ◽  
Nonlinear Optical ◽  
Diffuse Reflectance ◽  
Second Harmonic ◽  
Three Dimensional ◽  
One Dimensional ◽  
Nonlinear Optical Crystals ◽  
3D Network ◽  
3D Framework

A new nonlinear optical crystals fluoride carbonate, Na4Yb(CO3)3F, has been synthesized by mild hydrothermal method. The Na4Yb(CO3)3F crystallizes in the noncentrosymmetric space group Cc (no. 9) with the lattice parameters a = 8.018(3), b = 15.929(5), c = 13.950(5) Å and β = 101.425(6)°. The compound Na4Yb(CO3)3F has a high density of [CO3] groups. The structure can be described as one-dimensional [Na5Yb(CO3)2F2] chains connected by [CO3] groups, forming an intricate three-dimensional (3D) framework. Other Na+ and Yb3+ cations are located in the cavities of 3D network. The powder second harmonic generation (SHG) measurement shows that Na4Yb(CO3)3F features a large SHG response, about 4.3 times that of KH2PO4 (KDP), and is a phase-matchable material. In addition, its UV-Vis-NIR diffuse reflectance spectral data indicate that Na4Yb(CO3)3F has a large optical gap about 4.72 eV, which corresponds to the UV cut-off edge of 263 nm.

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