Chirality-dependent two-photon absorption probabilities and circular dichroic line strengths: theory, calculation and measurement

Lanthanide Complexes for Nonlinear Optics: From Fundamental Aspects to Applications

“…[52] This study, which provides information on molecular transition polarizabilities and structural data, was then rationalized and generalized in a theoretical analysis of chiral dependent TPA properties of molecules and crystals. [53] …”

Laser mass spectrometry with circularly polarized light: two-photon circular dichroism

“…The initial study of Richardson et al focused on the circular effects of two-photon absorption of molecules in the solid state and has been performed on Na 3 [Gd(C 4 H 4 O 5 ) 3 ]Á2NaClO 4 Á6H 2 O. 13 After a further ten years, TPCD of isolated molecules of 3-methylcyclopentanone (3-MCP) in the gas phase was published by Compton et al 14 These experiments were complemented by elaborate theoretical work on molecular TPCD published by Richardson et al 15 and Rizzo et al, [16][17][18][19] respectively.…”

Increasing ion yield circular dichroism in femtosecond photoionisation using optimal control theory

“…Moreover, due to the small absorption amplitude in the A-band transition of fenchone, we can use perturbation theory to predict which light-matter interaction terms will be the most relevant in this system. 17 Specifically, we expect three main contributions for each control field: DC components (E (0) x/y ), which primarily couple to the permanent dipole, one-photon excitation components (E (1) x/y ) with frequency o (1) , which primarily couple to the electric and magnetic dipole transitions, and two-photon excitation components (E (2) x/y ) with frequency o (2) which primarily couple to the electric quadrupole moments. 17 The interference between the one and two photon excitation pathways, together with the coupling to the DC field component, will be the main resource exploited by the optimised pulses.…”

“…y sin(o (1) t + j) + E (2) y sin(o (2) t + j)), (13) with j the relative phase between the x and y components of the electric field. In eqn ( 12) and ( 13) s(t) is an envelope function ensuring that the pulse is smoothly turned on and off.…”

“…These techniques either rely on the interaction of the sample with a chiral probe or on the construction of a chiral setup to record the response. 1 A prototypical chiral observables is circular dichroism (CD), which has been the subject of many theoretical [2][3][4][5][6][7][8] and experimental [9][10][11][12][13] studies. It is defined as the difference in absorption of circularly polarised light (acting as the chiral probe) by the two enantiomeric forms of a chiral molecule.…”