| Title |
Second harmonic generation theory for a helical macromolecule with high sensitivity to structural disorder |
| Authors |
Abramavičius, Darius ; Krouglov, Serguei ; Barzda, Virginijus |
| DOI |
10.1039/D1CP00694K |
| Full Text |
|
| Is Part of |
Physical chemistry chemical physics.. Cambridge : Royal Society of Chemistry. 2021, vol. 23, no. 36, p. 20201-20217.. ISSN 1463-9076. eISSN 1463-9084 |
| Abstract [eng] |
Microscopic theory for the second harmonic generation in a helical molecular system is developed in the minimal coupling representation including non-local interaction effects. At the second order to the field we find a compact expression which combines dipolar, quadrupolar and magnetic contributions. A detailed derivation of the response is performed to specifically isolate the quadratic coupling terms, which we denote as the K coupling. Applying the theory to a helical macromolecule we find that the dipolar and quadrupolar contributions reflect the symmetry properties of the system and its homogeneity, while the K coupling contribution reveals inhomogeneities of the system. |
| Published |
Cambridge : Royal Society of Chemistry |
| Type |
Journal article |
| Language |
English |
| Publication date |
2021 |
| CC license |
|
