Theoretical study of a novel organic electride with large nonlinear optical responses

2020 ◽  
Vol 120 (14) ◽  
Author(s):  
Yunyang Teng ◽  
Qi Sheng ◽  
Hui Weng ◽  
Zhongjun Zhou ◽  
Xuri Huang ◽  
...  
Keyword(s):  
Nonlinear Optical ◽  
Theoretical Study ◽  
Optical Responses

A theoretical study on novel alkaline earth-based excess electron compounds: unique alkalides with considerable nonlinear optical responses

2015 ◽  
Vol 17 (6) ◽  
pp. 4524-4532 ◽  
Author(s):  
Wei-Ming Sun ◽  
Di Wu ◽  
Ying Li ◽  
Jia-Yuan Liu ◽  
Hui-Min He ◽  
...  
Keyword(s):  
Alkali Metal ◽  
Nonlinear Optical ◽  
Alkaline Earth ◽  
Theoretical Study ◽  
Excess Electron ◽  
Optical Responses ◽  
Electron Compounds ◽  
Metal Anions

A series of novel excess electron compounds M(NH3)6NaCl and M(NH3)6Na2 (M = Mg and Ca) were designed, in which the lowest-energy M(NH3)6Na2 compounds are the first alkalides containing double alkali metal anions.

scholarly journals Linear and nonlinear optical responses in the chiral multifold semimetal RhSi

2020 ◽  
Vol 5 (1) ◽  
Author(s):  
Zhuoliang Ni ◽  
B. Xu ◽  
M.-Á. Sánchez-Martínez ◽  
Y. Zhang ◽  
K. Manna ◽  
...  
Keyword(s):  
Nonlinear Optical ◽  
Chemical Potential ◽  
Technological Development ◽  
Optical Responses ◽  
Chiral Magnetic Effect ◽  
Hole Band ◽  
Linear And Nonlinear ◽  
Characteristic Features ◽  
Topological Semimetals ◽  
Terahertz Emission Spectroscopy

AbstractChiral topological semimetals are materials that break both inversion and mirror symmetries. They host interesting phenomena such as the quantized circular photogalvanic effect (CPGE) and the chiral magnetic effect. In this work, we report a comprehensive theoretical and experimental analysis of the linear and nonlinear optical responses of the chiral topological semimetal RhSi, which is known to host multifold fermions. We show that the characteristic features of the optical conductivity, which display two distinct quasi-linear regimes above and below 0.4 eV, can be linked to excitations of different kinds of multifold fermions. The characteristic features of the CPGE, which displays a sign change at 0.4 eV and a large non-quantized response peak of around 160 μA/V2 at 0.7 eV, are explained by assuming that the chemical potential crosses a flat hole band at the Brillouin zone center. Our theory predicts that, in order to observe a quantized CPGE in RhSi, it is necessary to increase the chemical potential as well as the quasiparticle lifetime. More broadly, our methodology, especially the development of the broadband terahertz emission spectroscopy, could be widely applied to study photogalvanic effects in noncentrosymmetric materials and in topological insulators in a contact-less way and accelerate the technological development of efficient infrared detectors based on topological semimetals.

Second-order nonlinear optical properties of two chalcone derivatives: insights from sum-over-states

2021 ◽  
Author(s):  
Jean Custodio ◽  
Giulio Demetrius Creazo d'Oliveira ◽  
Fernando Gotardo ◽  
Leandro Cocca ◽  
Leonardo De Boni ◽  
...  
Keyword(s):  
Optical Properties ◽  
Nonlinear Optical ◽  
Theoretical Study ◽  
Second Order ◽  
Nonlinear Optical Properties ◽  
Chalcone Derivatives

In the following study, a combined experimental and theoretical study of the nonlinear optical properties (NLO) of two chalcone derivatives, (E)-3-(2-methoxyphenyl)-1-(2-(phenylsulfonylamine)phenyl)prop-2-en-1-one (MPSP) and (E)-3-(3-nitrophenyl)-1-(2-(phenylsulfonylamine)phenyl)prop-2-en-1-one (NPSP) in DMSO is reported. Single...

Theoretical study on the nonlinear optical properties of MX-chain

1994 ◽  
Author(s):  
Z. Shuai ◽  
J.M. Toussaint ◽  
J.L. Bredas ◽  
A. Saxena ◽  
A.R. Bishop
Keyword(s):  
Optical Properties ◽  
Nonlinear Optical ◽  
Theoretical Study ◽  
Nonlinear Optical Properties
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