Manifestations of the optical activity of molecules in the dipole photoeffect

Cherepkov, N. A.

doi:10.1088/0022-3700/16/9/013

Cited by 23 publications

(9 citation statements)

References 11 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…However, as originally pointed out by Ritchie [2] and later discussed in detail by Cherepkov, [3,4,5] helicity-dependent effects should be observed in photoelectron emission from chiral molecules even if randomly oriented. In this case, the dichroism arises only from the electric dipole operator and, therefore, its magnitude is expected to be of the order of 10…”

Section: à5mentioning

confidence: 89%

“…[2][3][4][5] The P 2 term in Equation (1) refers to the second-order Legendre polynomial and q is the scattering angle between the photoelectron momentum and light propagation. The helicity of the circularly polarized light is defined according to the value m = + + 1 (left circular polarization) or m = À1 (right circular polarization) of the projection of the photon spin along its momentum.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Angle‐Resolved Photoelectron Spectroscopy of Randomly Oriented 3‐Hydroxytetrahydrofuran Enantiomers

et al. 2005

View full text Add to dashboard Cite

Circular dichroism in the angular distribution of valence photoelectrons emitted from randomly oriented 3-hydroxytetrahydrofuran enantiomers (ThS and ThR) has been observed in gas-phase experiments using circularly polarized vacuum ultraviolet (VUV) light. The measured dichroism for both ThS and ThR, acquired at the single magic angle theta=234.73 degrees and at photon energies of 22, 19, 16, and 14 eV, points to an asymmetric forward-backward scattering of the photoelectrons from their highest occupied molecular orbitals (HOMO) HOMO-1 and HOMO-2, of up to 5%, depending on the photon energy. The asymmetry reverses on exchange of either the helicity of the radiation or the configuration of Th. The photoionization dichroic D parameters of ThS and ThR have been measured and their values discussed in the light of LCAO B-spline density functional theory (DFT) predictions. While an acceptable agreement is found between the dichroic parameter measured and calculated at the highest photon energy for the HOMO and HOMO-2 orbitals of Th, a significant discrepancy is observed for the HOMO-1 state which is attributed to the floppiness of Th, in particular to the comparatively large sensitivity of the size and shape of its HOMO-1 on nuclear vibrational motion.

show abstract

Section: à5mentioning

confidence: 89%

Section: Introductionmentioning

confidence: 99%

Angle‐Resolved Photoelectron Spectroscopy of Randomly Oriented 3‐Hydroxytetrahydrofuran Enantiomers

et al. 2005

View full text Add to dashboard Cite

show abstract

“…These experimental findings are in agreement with the nonrelativistic theory of spin-polarized PE from isolated atoms developed by Cherepkov. 4,5 For CP excitation, this theory predicts opposite polarization along the z axis and, in particular, a polarization ratio reciprocal to the statistical weights (2Jϩ1) of the two lines, i.e., P 5/2 : P 7/2 ϭ Ϫ1.33:1; for linearly polarized light, the in-plane spinpolarization components ( P z and P y ) are expected to vanish. We show below that, for CP excitation, the statistical ratio is predicted to hold also for the solid-state case where the photoelectrons are in principle subject to scattering from the nonmagnetic W atoms.…”

mentioning

confidence: 99%

“…3 In particular, photoelectrons excited by CP light from p, d, and f shells can acquire substantial spin polarization over a wide photon energy range. 4 Up to now, the spin analysis of photoelectrons from unpolarized targets has mostly served fundamental interests of ͑i͒ understanding photoemission ͑PE͒ dynamics through quantum mechanically ''complete'' experiments 5,6 and ͑ii͒ characterizing the symmetry of valence bands in nonmagnetic solids. 7 However, spin-polarized photoelectrons from core levels also have an important potential application as internal sources of polarized electrons in spin-polarized photoelectron diffraction 8 ͑SPPD͒ and spin-dependent inelastic scattering experiments.…”

mentioning

confidence: 99%

Spin-polarized photoelectrons excited by circularly polarized radiation from a nonmagnetic solid

et al. 1996

View full text Add to dashboard Cite

We report a spin analysis of core-level photoelectrons excited by circularly polarized x rays from a nonmagnetic solid. In a combined experimental and theoretical study, we show that the spin-orbit-split W 4 f 7/2 and 4 f 5/2 photoemission lines from W͑110͒ exhibit high spin polarizations of opposite sign that vary with energy and emission direction. These results suggest the study of the magnetic structure of nonmagnetic/ferromagnetic interfaces formed on high-atomic-number substrates by spin-polarized photoelectron diffraction.

show abstract

“…Can the chiral geometry of molecules lead to similar geometric fields? Here we address this question by considering photoionization of chiral molecules, which can yield very sensitive chiral signals [4][5][6][7][8][9][10][11][12].…”

mentioning

confidence: 99%

Geometric magnetism and new enantio-sensitive observables in photoionization of chiral molecules

Ordóñez

Ayuso

Decleva

et al. 2023

Preprint

View full text Add to dashboard Cite

Chiral molecules are instrumental for molecular recognition in living organisms. Distinguishing between two opposite enantiomers, the mirror twins of the same chiral molecule, is both vital and challenging. Geometric magnetism enables a broad class of phenomena in solids including the anomalous electron velocity, the Hall effect, and related topological observables. Here we show that ultrafast electron currents excited in chiral molecules can generate geometric fields which enable a new class of extremely efficient enantio-sensitive observables in phtoionization. Next, we introduce the first member of this new class: enantio-sensitive orientation of chiral molecules via photoionization. This effect opens new routes to both enantio-separation and imaging of chiral dynamics on ultrafast time scales. Our work suggests that geometric magnetism in photoionization provides the bridge between the two geometrical properties, chirality and topology.

show abstract

Manifestations of the optical activity of molecules in the dipole photoeffect

Cited by 23 publications

References 11 publications

Angle‐Resolved Photoelectron Spectroscopy of Randomly Oriented 3‐Hydroxytetrahydrofuran Enantiomers

Angle‐Resolved Photoelectron Spectroscopy of Randomly Oriented 3‐Hydroxytetrahydrofuran Enantiomers

Spin-polarized photoelectrons excited by circularly polarized radiation from a nonmagnetic solid

Geometric magnetism and new enantio-sensitive observables in photoionization of chiral molecules

Contact Info

Product

Resources

About