Linearly polarized probes of surface chirality

Verbiest, Thierry; Kauranen, Martti; Maki, Jeffery J.; Teerenstra, M.N.; Schouten, A.J.; Nolte, Roeland J. M.; Persoons, André

doi:10.1063/1.470714

Cited by 55 publications

(32 citation statements)

References 11 publications

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“…In the latter the SHG response has a different intensity for positive (45° or −135°) and negative (135° or −45°) polarization state of the pump beam [34,35]. Both these phenomena depend on well defined incoming and outgoing polarization states.…”

Section: Resultsmentioning

confidence: 99%

Linearly polarized second harmonic generation microscopy reveals chirality

Valev¹,

Silhanek²,

Smisdom³

et al. 2010

Opt. Express

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Abstract:In optics, chirality is typically associated with circularly polarized light. Here we present a novel way to detect the handedness of chiral materials with linearly polarized light. We performed Second Harmonic Generation (SHG) microscopy on G-shaped planar chiral nanostructures made of gold. The SHG response originates in distinctive hotspots, whose arrangement is dependent of the handedness. These results uncover new directions for studying chirality in artificial materials.

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Section: Resultsmentioning

confidence: 99%

Linearly polarized second harmonic generation microscopy reveals chirality

Valev¹,

Silhanek²,

Smisdom³

et al. 2010

Opt. Express

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show abstract

“…T h e differences between measurements utilizing quarter-and half-wave plates have been studied extensively both theoretically [43] and experimentally [22]. These results show that the connection between the expansion coefficients f , g and h and the polarization line shapes recorded using a quarter-wave plate is unique, whereas for the case of half-wave-plate measurements no unique relation exists [43].…”

Section: Continuous Polarization Measurementsmentioning

confidence: 98%

“…It is also possible to use appropriately chosen linear input polarizations as probes of surface chirality [20,22,411. For the case of linear polarizations that are rotated by f 4 5 " from the p-polarized direction, E, = fE, and the intensity of the second-harmonic field is This result implies that a different response for these two linear polarizations (linear-difference response) can also occur only for the case of chiral surfaces.…”

Section: Intensity-difference and Polarization Rotation Effectsmentioning

confidence: 99%

Second-order nonlinear optical signatures of surface chirality

Kauranen¹,

Verbiest²,

Persoons³

1998

Journal of Modern Optics

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Second-harmonic generation can be used to probe chiral properties of surfaces and thin films with in-plane isotropy. W e present a general formalism to analyse such chiral effects and apply it to review known effects and to introduce new effects. T h e formalism is based on expanding the fundamental and second-harmonic fields in terms of their p-and s-polarized components. Each second-harmonic signal can then be described in terms of only three nonlinear coefficients, which are associated with the quadratic combinations of the fundamental-field components. T h e coefficients can be classified as achiral (allowxd for all isotropic surfaces) or chiral (allowed only for chiral surfaces) independent of the details of the nonlinear light-matter interaction. T h e basic signatures of chirality are intensity-difference effects in which the efficiencies of second-harmonic generation are different for left-and right-hand circularlypolarized light or two orthogonal linear polarizations, for example. These effects depend on proper phase relations between the achiral and chiral coefficients. Measurements in which the state of polarization of the fundamental beam is continuously varied by a rotating quarter-wave plate are shown to be sensitive to chirality independent of any particular phase relation between the coefficients. Such measurements can also be used to determine uniquely the relative complex values of the coefficients and thus to characterize completely the nonlinear chiral response. T h e ability of the techniques to distinguish absolutely between the enantiomers of a chiral sample is possible only if interference between the electric-dipole and higher-multipole parts of the coefficients dominates the chiral response.

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“…1b). The induced chiral excess was quantitatively characterized through second-harmonic generation (SHG) combined with linear dichroism (SHG-LD) method [20][21][22] . The typical polarization dependence curves of SH intensity from PDA films polymerized by application of LPL irradiation (10 mW cm À 2 ) in a parallel magnetic field (0.5 T) were shown in Supplementary Fig.…”

Section: Resultsmentioning

confidence: 99%

Enantioselective synthesis of helical polydiacetylene by application of linearly polarized light and magnetic field

et al. 2014

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Magnetic optical activity, which can occur in all media and is induced by longitudinal magnetic field, causes the difference in absorption coefficients of left and right circularly polarized light and has the potential for magnetically induced enantioselectivity in chemical reactions. Compared with the well-established technique with circularly polarized light, there are few reports on the production of helical conjugated polymers in a photochemical reaction based on above magnetochiral anisotropy mechanism. Herein, we demonstrate experimentally that the enantioselective polymerization of diacetylene derivative can be achieved in the liquid crystal phase by application of linearly polarized light under a parallel or antiparallel magnetic field. The screw direction of predominant helical polydiacetylene chain can be rigorously controlled with the relative orientation of linearly polarized light and the magnetic field. Moreover, the prepared helical polydiacetylene assemblies can serve as a direct visual probe for the enantioselective recognition of D-or L-lysine.

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Linearly polarized probes of surface chirality

Cited by 55 publications

References 11 publications

Linearly polarized second harmonic generation microscopy reveals chirality

Linearly polarized second harmonic generation microscopy reveals chirality

Second-order nonlinear optical signatures of surface chirality

Enantioselective synthesis of helical polydiacetylene by application of linearly polarized light and magnetic field

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