scholarly journals Electronic structure, linear, and nonlinear optical responses in magnetoelectric multiferroic material BiFeO3

2009 ◽  
Vol 130 (21) ◽  
pp. 214708 ◽  
Author(s):  
Sheng Ju ◽  
Tian-Yi Cai ◽  
Guang-Yu Guo
Keyword(s):  
Electronic Structure ◽  
Nonlinear Optical ◽  
Multiferroic Material ◽  
Optical Responses ◽  
Linear And Nonlinear

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.

Linear and nonlinear optical responses in bacteriochlorophyll a

2007 ◽  
Vol 95 (2-3) ◽  
pp. 309-316 ◽  
Author(s):  
Mitsuru Sugisaki ◽  
Ritsuko Fujii ◽  
Richard J. Cogdell ◽  
Hideki Hashimoto
Keyword(s):  
Nonlinear Optical ◽  
Bacteriochlorophyll A ◽  
Optical Responses ◽  
Linear And Nonlinear

An Unprecedented Antimony(III) Borate with Strong Linear and Nonlinear Optical Responses

2020 ◽  
Vol 132 (20) ◽  
pp. 7867-7870 ◽  
Author(s):  
Youchao Liu ◽  
Xiaomeng Liu ◽  
Shuai Liu ◽  
Qingran Ding ◽  
Yanqiang Li ◽  
...  
Keyword(s):  
Nonlinear Optical ◽  
Optical Responses ◽  
Linear And Nonlinear

LINEAR AND NONLINEAR OPTICAL PROPERTIES OF GOLD NANOPARTICLES WITH BROKEN SYMMETRY

2006 ◽  
Vol 15 (01) ◽  
pp. 43-53 ◽  
Author(s):  
BRIAN K. CANFIELD ◽  
SAMI KUJALA ◽  
KAISA LAIHO ◽  
KONSTANTINS JEFIMOVS ◽  
TUOMAS VALLIUS ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Optical Properties ◽  
Electron Beam Lithography ◽  
Nonlinear Optical ◽  
Optical Measurements ◽  
Broken Symmetry ◽  
Nanoparticle Arrays ◽  
Optical Responses ◽  
Optical Generation ◽  
Linear And Nonlinear

We describe our research involving arrays of gold nanoparticles fabricated with electron beam lithography. Small defects in the particles introduced during the fabrication process result in broken design symmetry. The broken symmetry renders the arrays chiral, and signatures of chirality can be observed in both the linear and nonlinear optical responses through precise polarization measurements. The defects enhance the local electric field, enabling more efficient nonlinear optical generation and therefore making nonlinear optical measurements more sensitive to their presence. We also discuss future objectives for clarifying the microscopic processes underlying the optical responses in gold nanoparticle arrays.

scholarly journals Dielectric and Absorbate Effects on the Optical Properties of Phosphazenes

1993 ◽  
Vol 328 ◽  
Author(s):  
KIM F. Ferris ◽  
W. D. Samuels ◽  
Y. Morita ◽  
G. J. Exarhos
Keyword(s):  
Optical Properties ◽  
Electronic Structure ◽  
Nonlinear Optical ◽  
Electronic Structure Calculations ◽  
Model Systems ◽  
Cyclic Molecules ◽  
Out Of Plane ◽  
Linear And Nonlinear ◽  
Bonding Systems ◽  
Structure Calculations

ABSTRACTThe optical response of polyphosphazenes can be directly related to the π (out-of-plane) and π′ (in-plane) bonding interactions intrinsic to the electronic structure of these Materials. Altering this structure either by hydrogen bonding or absórbate effects, affects both the linear and nonlinear optical susceptibilities. In this paper, we have performed electronic structure calculations on the cyclic Molecules, P3N3 (NHCH3)6, P3N3(SCH3)6, P3N3 (OCH3)6 and P4N4 (NHCH3)8 as model systems for the polymer. Charge distribution arguments are discussed to explain the influence of a polarizing electric field on the π bonding systems, and are used to suggest methods to enhance their nonlinearities.

An Unprecedented Antimony(III) Borate with Strong Linear and Nonlinear Optical Responses

2020 ◽  
Vol 59 (20) ◽  
pp. 7793-7796 ◽  
Author(s):  
Youchao Liu ◽  
Xiaomeng Liu ◽  
Shuai Liu ◽  
Qingran Ding ◽  
Yanqiang Li ◽  
...  
Keyword(s):  
Nonlinear Optical ◽  
Optical Responses ◽  
Linear And Nonlinear

A new method to analyze and understand molecular linear and nonlinear optical responses via field-induced functions: a straightforward alternative to sum-over-states (SOS) analysis

2019 ◽  
Vol 21 (11) ◽  
pp. 6274-6286 ◽  
Author(s):  
Nicolás Otero ◽  
Panaghiotis Karamanis ◽  
Marcos Mandado
Keyword(s):  
Excited State ◽  
Nonlinear Optical ◽  
New Method ◽  
Optical Responses ◽  
Linear And Nonlinear ◽  
Orbital Analysis

Using coupled-perturbed theory the same excited state/orbital analysis as the sum-over-states method may be performed.

Specific features of linear and nonlinear optical responses of chalcogenide glasses in the As-S-Se and As-Se-Te systems

2014 ◽  
Vol 117 (1) ◽  
pp. 49-55 ◽  
Author(s):  
Yu. S. Kuzyutkina ◽  
E. A. Romanova ◽  
V. I. Kochubei ◽  
V. S. Shiryaev
Keyword(s):  
Chalcogenide Glasses ◽  
Nonlinear Optical ◽  
Optical Responses ◽  
Linear And Nonlinear
Sign in / Sign up

Export Citation Format

Share Document