Article (Scientific journals)
Diagrammatic theory of magnetic and quadrupolar contributions to sum-frequency generation in composite systems.
Noblet, Thomas; Busson, Bertrand
2024In Journal of Chemical Physics, 160 (2)
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Keywords :
Physical and Theoretical Chemistry; General Physics and Astronomy
Abstract :
[en] Second-order nonlinear processes like Sum-Frequency Generation (SFG) are essentially defined in the electric dipolar approximation. However, when dealing with the SFG responses of bulk, big nanoparticles, highly symmetric objects, or chiral species, magnetic and quadrupolar contributions play a significant role in the process too. We extend the diagrammatic theory for linear and nonlinear optics to include these terms for single objects as well as for multipartite systems in interaction. Magnetic and quadrupolar quantities are introduced in the formalism as incoming fields, interaction intermediates, and sources of optical nonlinearity. New response functions and complex nonlinear processes are defined, and their symmetry properties are analyzed. This leads to a focus on several kinds of applications involving nanoscale coupled objects, symmetric molecular systems, and chiral materials, both in line with the existing literature and opening new possibilities for original complex systems.
Disciplines :
Physics
Author, co-author :
Noblet, Thomas  ;  Université de Liège - ULiège > Complex and Entangled Systems from Atoms to Materials (CESAM)
Busson, Bertrand ;  Université Paris-Saclay, CNRS, Institut de Chimie Physique, UMR 8000, 91405 Orsay, France
Language :
English
Title :
Diagrammatic theory of magnetic and quadrupolar contributions to sum-frequency generation in composite systems.
Publication date :
14 January 2024
Journal title :
Journal of Chemical Physics
ISSN :
0021-9606
eISSN :
1089-7690
Publisher :
AIP Publishing, United States
Volume :
160
Issue :
2
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 11 January 2024

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