Mueller matrix polarimetry of bianisotropic materials [Invited]

Arteaga, Oriol; Kahr, Bart

doi:10.1364/josab.36.000f72

Cited by 54 publications

(51 citation statements)

References 93 publications

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“…However, Bragg reflection characteristics of a cholesteric stack are rarely observed in non-aligned polymer thin films 17,21 . To overcome potential artefacts and establish the true origins of the chiroptical effect in polymer thin films, we have performed detailed MMSE in both transmission and reflection, which is well suited to the optical analysis of thin films of complicated chiral systems 39 . MMSE has previously been used to evaluate the structural CD and Circular Birefringence (CB) in cellulose, small-molecule aggregates and non-conjugated polymers 22,[40][41][42] .…”

Section: Resultsmentioning

confidence: 99%

Natural optical activity as the origin of the large chiroptical properties in π-conjugated polymer thin films

et al. 2020

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Polymer thin films that emit and absorb circularly polarised light have been demonstrated with the promise of achieving important technological advances; from efficient, high-performance displays, to 3D imaging and all-organic spintronic devices. However, the origin of the large chiroptical effects in such films has, until now, remained elusive. We investigate the emergence of such phenomena in achiral polymers blended with a chiral small-molecule additive (1-aza[6]helicene) and intrinsically chiral-sidechain polymers using a combination of spectroscopic methods and structural probes. We show that – under conditions relevant for device fabrication – the large chiroptical effects are caused by magneto-electric coupling (natural optical activity), not structural chirality as previously assumed, and may occur because of local order in a cylinder blue phase-type organisation. This disruptive mechanistic insight into chiral polymer thin films will offer new approaches towards chiroptical materials development after almost three decades of research in this area.

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Section: Resultsmentioning

confidence: 99%

Natural optical activity as the origin of the large chiroptical properties in π-conjugated polymer thin films

et al. 2020

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“…17,21 To overcome potential artefacts and establish the true origins of the chiroptical effect in polymer thin films, we have performed detailed MMSE in both transmission and reflection, which is well suited to the optical analysis of thin films of complicated chiral systems. 39 MMSE has previously been used to evaluate the structural CD and Circular Birefringence (CB) in cellulose, small-molecule aggregates and non-conjugated polymers. 22,[40][41][42] Further mathematical descriptions of the MMSE are provided in the Supporting Information (SI).…”

Section: Resultsmentioning

confidence: 99%

A Unified Model to Explain the Large Chiroptical Effects in Polymer Systems Through Natural Optical Activity

Wade¹,

Hilfiker²,

Brandt³

et al. 2020

Preprint

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<div><div><div><p>Polymer thin films that emit and absorb circularly polarised light have been demonstrated with the promise of achieving important technological advances; from efficient, high-performance displays, to 3D imaging and all-organic spintronic devices. However, the origin of the large chiroptical effects in such films has, until now, remained elusive. We investigate the emergence of such phenomena in achiral polymers blended with a chiral small-molecule additive (1-aza[6]helicene) and intrinsically chiral-sidechain polymers using a combination of spectroscopic methods and structural probes. We show that – under conditions relevant for device fabrication – the large chiroptical effects are caused by coupling of electric and magnetic transition dipole moments (natural optical activity), not structural chirality as previously assumed, and may occur because of local order in a cylinder blue phase-type organisation. This disruptive mechanistic insight into chiral polymer thin films will offer new approaches towards chiroptical materials development after almost three decades of research in this area.</p></div></div></div>

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“…The input Stokes vector S in was determined by rotating the PSG. [ 55 ] After the PSG, the linear polarized light impinged upon the sample containing His‐ICH microplates. A polarization‐sensitive camera was used as a polarization state analyzer (PSA), and it detected the light exiting from the sample.…”

Section: Resultsmentioning

confidence: 99%

Passive Polarized Light Guiding and Thermally Induced Visible Fluorescence in Histidine Microstructures with Optical Switching Function

Handelman

Lapsker

Jacob

et al. 2020

Adv Funct Materials

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The increasing interest in implantable medical devices that incorporate photonic components has accelerated the search for new, biocompatible optical materials at micro‐ and nano‐scale. This work proposes use of the polar amino acid L‐histidine as a candidate for bio‐photonic devices. L‐histidine is self‐assembled into diverse solid‐state crystallized microstructures, one of which—the elongated hexagonal microplate—is shown to have passive waveguiding capability of polarized light. The interaction of polarized light with histidine microplates having different orientations and thicknesses is studied from Stokes parameters and Mueller matrix. The linear birefringence of histidine microplates is estimated by using the theory of generalized Jones matrix for biaxial crystals. Visible fluorescence in heated histidine microplates is discovered and its origin is discussed. The phenomenon of passive waveguiding capability of polarized light by such an elongated hexagonal microplate means that the microplate can be used as a part of an optical switch. The findings show that besides the known chemical and biological characteristics of the amino acid histidine, it also has optical properties that can be exploited in multifunctional biophotonic applications, such as waveguides, polarizers, interconnects, and light sources.

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Mueller matrix polarimetry of bianisotropic materials [Invited]

Cited by 54 publications

References 93 publications

Natural optical activity as the origin of the large chiroptical properties in π-conjugated polymer thin films

Natural optical activity as the origin of the large chiroptical properties in π-conjugated polymer thin films

A Unified Model to Explain the Large Chiroptical Effects in Polymer Systems Through Natural Optical Activity

Passive Polarized Light Guiding and Thermally Induced Visible Fluorescence in Histidine Microstructures with Optical Switching Function

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