Chirality and Chiroptical Effects in Plasmonic Nanostructures: Fundamentals, Recent Progress, and Outlook

Valev, Ventsislav K.; Baumberg, Jeremy J.; Sibilia, C.; Verbiest, Thierry

doi:10.1002/adma.201205178

Cited by 660 publications

(570 citation statements)

References 99 publications

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“…The effect commonly measured is circular dichroism (CD), the differential absorption of left and right circularly polarized light by chiral molecules and materials 3 . Unlike organic molecules, where the chiroptical effects are typically small at visible wavelengths, larger inorganic systems (roughly over ten nanometres to several hundreds of nanometres) may show stronger chiroptical effects [4][5][6] . Several mechanisms were suggested for induction of chiroptical phenomena in such systems (both metallic and semiconducting).…”

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confidence: 99%

Enantioselective control of lattice and shape chirality in inorganic nanostructures using chiral biomolecules

et al. 2014

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A large number of inorganic materials form crystals with chiral symmetry groups. Enantioselectively synthesizing nanostructures of such materials should lead to interesting optical activity effects. Here we report the synthesis of colloidal tellurium and selenium nanostructures using thiolated chiral biomolecules. The synthesis conditions are tuned to obtain tellurium nanostructures with chiral shapes and large optical activity. These nanostructures exhibit visible optical and chiroptical responses that shift with size and are successfully simulated by an electromagnetic model. The model shows that they behave as chiral optical resonators. The chiral tellurium nanostructures are transformed into chiral gold and silver telluride nanostructures with very large chiroptical activity, demonstrating a simple colloidal chemistry path to chiral plasmonic and semiconductor metamaterials. These materials are natural candidates for studies related to interactions of chiral (bio)molecules with chiral inorganic surfaces, with relevance to asymmetric catalysis, chiral crystallization and the evolution of homochirality in biomolecules.

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confidence: 99%

Enantioselective control of lattice and shape chirality in inorganic nanostructures using chiral biomolecules

et al. 2014

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“…[6] It has been shown that plasmonic nanostructures forming 1D [7] elements, 2D metasurfaces, [8][9][10] and 3D metamaterials [11] can exhibit linear chiral response due to their own, intrinsic chirality. Also semiconductor nanostructures can exhibit chiral features.…”

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confidence: 99%

Evidence of Optical Circular Dichroism in GaAs‐Based Nanowires Partially Covered with Gold

Leahu

Petronijevic

Belardini

et al. 2017

Advanced Optical Materials

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thus paves the way for the important applications spreading from negative refraction, [1][2][3] chiral sensing [4,5] to production of optical field carrying out optical angular momentum for quantum information applications. [6] It has been shown that plasmonic nanostructures forming 1D [7] elements, 2D metasurfaces, [8][9][10] and 3D metamaterials [11] can exhibit linear chiral response due to their own, intrinsic chirality. Also semiconductor nanostructures can exhibit chiral features. [12][13][14][15][16] From the optical point of view, chiral structures possess the ability to rotate the plane of the polarization of electromagnetic waves (optical activity), and give rise to circular dichroism-i.e., the difference in the absorption of right-and lefthanded circular polarized light.Apart from 3D chiral objects, the possibility to obtain optical chirality, i.e., optical activity, with nonchiral elements was studied in the past, [17] but only recently reconsidered. [18,19] This phenomenon is obtained when the experimental configuration composed by both the nonchiral object and the optical incident field is nonsuperimposable on its mirror image. [20] This is called "extrinsic" chirality; in our previous works we have investigated this type of chirality in tilted golden nanowires by means of both linear (reflection and absorption) and nonlinear (second harmonic generation) measurements. [20][21][22][23] III-V semiconductor nanowires (NWs) have been widely investigated since they exhibit good waveguiding properties thus offering a light manipulation at nanoscale. Coupling of the incident light to the discrete leaky waveguide modes above the bandgap in NWs leads to increased resonant absorption, thus paving the way for important applications such as energy harvesting, spectral selectivity, lasing, spin angular momentum generation, etc. [24][25][26][27] Metallic NWs have also been investigated for plasmonic laser applications [28][29][30] and possibility of surface plasmon polaritons excitation. [31] One step further is the partial covering of such NWs with gold: this can induce, along with the proper experiment setup, the symmetry breaking which leads to chiral response.In this paper, for the first time to our knowledge, we report on a circular dichroism behavior from semiconductor hexagonal Semiconductor nanostructures hybridized with metals have been known to offer new opportunities in nonlinear optics, plasmonics, lasing, biosensors; among them GaAs-based nanowires (NWs) hybridized with gold can offer new functionalities, as chiral sensing and light manipulation, as well as circular polarization sources. This study investigates GaAs-AlGaAs-GaAs NWs fabricated by self-catalyzed growth on Si substrates, and partially covered with gold, thus inducing the symmetry breaking and a potential chiral response. Three different samples are investigated, each of them with a different morphology, as the length and the overall diameter ranging from 4.6 to 5.19 µm and from 138 up to 165 nm, respectively. The samples are first char...

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“…1,2 A number of methods have been designed to arrange nanoparticles (NPs) in chiral assemblies. 3,4,5,6,7 The amplification of optical effects by the inclusion of metallic NPs in chiral nematic LCs has recently been explored very actively, especially as the chiral organization of gold or silver NPs promises fascinating metamaterial behaviour. 8,9,10,11 Optical metamaterials capable of interacting with circularly polarized (CP) light, based on helical structures, are of considerable interest as CP light can be used e.g.…”

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Helically Twisted Chiral Arrays of Gold Nanoparticles Coated with a Cholesterol Mesogen

et al. 2015

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Gold nanoparticles have been prepared, surface-functionalized with a 1:1 molar mixture of a hexylthiol ligand and a chiral mesogenic ligand consisting of a cholesterylbenzoate attached via an undecylthiol spacer. Grazing incidence Xray diffraction showed that, upon annealing, a columnar liquid crystal (LC) structure develops, with the nanoparticles forming strings on a regular oblique 2d lattice. Synchrotron radiation circular dichroism is substantially enhanced upon the isotropic-LC transition. In the proposed structural model, layers of gold columns rotate by a small angle relative to their neighbors, the columns winding around a helical axis. The work demonstrates that it is possible to obtain chiral LC superstructures from nanoparticles coated with chiral mesogen without the addition of a separate liquid crystal or chiral dopants. The results provide direction in the development of plasmonic metamaterials interacting selectively with circularly polarized light.

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Chirality and Chiroptical Effects in Plasmonic Nanostructures: Fundamentals, Recent Progress, and Outlook

Cited by 660 publications

References 99 publications

Enantioselective control of lattice and shape chirality in inorganic nanostructures using chiral biomolecules

Enantioselective control of lattice and shape chirality in inorganic nanostructures using chiral biomolecules

Evidence of Optical Circular Dichroism in GaAs‐Based Nanowires Partially Covered with Gold

Helically Twisted Chiral Arrays of Gold Nanoparticles Coated with a Cholesterol Mesogen

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