Imperial College London
Alternate

ProfessorMishaIvanov

Faculty of Natural Sciences, Department of Physics

Chair-Theoretical Attosec Sci/Ultraf Quantum Coher
 
 
 
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Contact

 

+44 (0)20 7594 9719m.ivanov

 
 
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Location

 

Blackett LaboratorySouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Neufeld:2019:10.1103/PhysRevX.9.031002,
author = {Neufeld, O and Ayuso, D and Decleva, P and Ivanov, MY and Smirnova, O and Cohen, O},
doi = {10.1103/PhysRevX.9.031002},
journal = {Physical Review X},
title = {Ultrasensitive chiral spectroscopy by dynamical symmetry breaking in high harmonic generation},
url = {http://dx.doi.org/10.1103/PhysRevX.9.031002},
volume = {9},
year = {2019}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - We propose and numerically demonstrate a new chiral spectroscopy method that is based on a universal system-independent mechanism of dynamical symmetry breaking in high harmonic generation (HHG). The proposed technique relies only on intense electric-dipole transitions and not on their interplay with magnetic dipole transitions. The symmetry breaking results in the emission of otherwise “forbidden” harmonics from chiral media (i.e., that are not emitted from achiral or racemic media), yielding a huge, nearly background-free, chiral-achiral signal that is correlated to the magnitude of the medium’s enantiomeric excess. The handedness of the medium can be directly detected by measuring the polarization helicity of the emitted harmonics. Moreover, the strength of the “allowed” harmonics (that are not related to symmetry breaking) is chirality independent; hence, they can be used as a reference to probe chiral degrees of freedom within a single measurement. We numerically demonstrate up to 99% chiral-achiral signal level (normalized difference between the chiral and achiral HHG spectra) from microscopic gas-phase emission using state-of-the-art models for HHG in bromochlorofluoromethane and propylene oxide. We expect the new method to give rise to precise tabletop characterization of chiral media in the gas phase and for highly sensitive time-resolved probing of dynamical chiral processes with femtosecond-to-attosecond temporal resolution.
AU  - Neufeld,O
AU  - Ayuso,D
AU  - Decleva,P
AU  - Ivanov,MY
AU  - Smirnova,O
AU  - Cohen,O
DO  - 10.1103/PhysRevX.9.031002
PY  - 2019///
SN  - 2160-3308
TI  - Ultrasensitive chiral spectroscopy by dynamical symmetry breaking in high harmonic generation
T2  - Physical Review X
UR  - http://dx.doi.org/10.1103/PhysRevX.9.031002
UR  - http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000473539700001&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=1ba7043ffcc86c417c072aa74d649202
UR  - https://journals.aps.org/prx/abstract/10.1103/PhysRevX.9.031002
VL  - 9
ER  -
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