2014
DOI: 10.1088/1367-2630/16/1/013020
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Discriminatory optical force for chiral molecules

Abstract: We suggest that the force F exerted upon a chiral molecule by light assumes the form F = a∇w + b∇h under appropriate circumstances, where a and b pertain to the molecule whilst w and h are the local densities of electric energy and helicity in the optical field; the gradients ∇ of these quantities thus governing the molecule's centre-of-mass motion. Whereas a is identical for the mirrorimage forms or enantiomers of the molecule, b has opposite signs; the associated contribution to F therefore pointing in oppos… Show more

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Cited by 161 publications
(195 citation statements)
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References 122 publications
(278 reference statements)
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“…This gains special significance as it implies that chirality flow can lead to opposite forces on molecules of different handedness 39 . Such handedness-dependent forces have been investigated and interpreted through different approaches 8,11,13,39,40 . The chirality flow of the CSPP is shown in Figure 2e.…”
Section: Resultsmentioning
confidence: 99%
“…This gains special significance as it implies that chirality flow can lead to opposite forces on molecules of different handedness 39 . Such handedness-dependent forces have been investigated and interpreted through different approaches 8,11,13,39,40 . The chirality flow of the CSPP is shown in Figure 2e.…”
Section: Resultsmentioning
confidence: 99%
“…Indeed, despite an obvious practical interest there are only a few theoretical works dealing with electromagnetic field-induced mechanical separation of nanometre-sized chiral entities 14,15,[18][19][20][21][22][23] , whereas no experimental realization has been reported so far. However, straightforward downsizing of an approach based on the circular Bragg reflection phenomenon has obvious inherent limitations.…”
Section: Discussionmentioning
confidence: 99%
“…17 and corresponding Focus Issue). Despite a few theoretical proposals to achieve photoinduced chiral separation [18][19][20][21][22][23] , the realization of an optical chiral sorter is, however, missing so far.…”
mentioning
confidence: 99%
“…Although present results concern a given chiral material system explored at the 1-100 mm scale, combining this first experimental step to several recent theoretical studies on helicity-dependent optomechanics at the submicrometre scale [29][30][31][32] should motivate the development of practical realization of optomechanical strategies for selective optical trapping and manipulation of chiral objects whose application potential is multidisciplinary by nature.…”
Section: Discussionmentioning
confidence: 84%