Discriminatory optical force for chiral molecules

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Cameron, R.P. ; Barnett, S.M. ; Yao, A.M. (2014)

We suggest that the force F exerted upon a chiral molecule by light assumes the form 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 mirror-image forms or enantiomers of the molecule, b has opposite signs; the associated contribution to F therefore pointing in opposite directions. A simple optical field is presented for which vanishes but does not, so that F is absolutely discriminatory. We then present two potential applications: a Stern–Gerlach-type deflector capable of spatially separating the enantiomers of a chiral molecule and a diffraction grating to which chiral molecules alone are sensitive; the resulting diffraction patterns thus encoding information about their chiral geometry.
  • References (108)
    108 references, page 1 of 11

    [1] Lord Kelvin 1894 The molecular tactics of a crystal J. Oxford Univ. Jr. Sci. Club 18 3-57

    [2] Bentley R 2010 Chiral: a confusing etymology Chirality 22 1-2

    [3] Lough W J and Wainer I W 2002 Chirality in Natural and Applied Science (Cornwall: Blackwell)

    [4] Lee T D and Yang C N 1956 Question of parity conservation in weak interactions Phys. Rev. 104 254-8

    [5] Wu C S, Ambler E, Hayward R W, Hoppes D D and Hudson R P 1957 Experimental test of parity conservation in beta decay Phys. Rev. 105 1413-5

    [6] Kondepudi D K and Durand D J 2001 Chiral asymmetry in spiral galaxies? Chirality 13 351-56

    [7] Barron L D 2004 Molecular Light Scattering and Optical Activity (Cambridge: Cambridge University Press)

    [8] Newman M S, Lutz W B and Lednicer D 1955 A new reagent for resolution by complex formation the resolution of phenanthro [3, 4-c] phenanthrene J. Am. Chem. Soc. 77 3420-1

    [9] Newman M S and Lednicer D 1956 The synthesis and resolution of hexahelicene J. Am. Chem. Soc. 78 4765-70

    [10] Bonner W A 1995 Chirality and life Origins Life Evol. B 25 175-90

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