Circularly Polarized Luminescence in Chiral Molecules and Supramolecular Assemblies

Kumar, Jatish; Nakashima, Takuya; Kawai, Tsuyoshi

doi:10.1021/acs.jpclett.5b01452

Cited by 571 publications

(370 citation statements)

References 71 publications

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“…The calculated value of the dissymmetry factor (| g lum |) of the CPL signal is about 1.1 × 10 −2 (Fig. 5a), which is a relatively large value compared with the ones reported in solution or in solid state535455. More interestingly, after mixing with BPEA, the CPL peak of the co-gels shifted from 405 to 500 nm, as shown in Fig.…”

Section: Resultsmentioning

confidence: 63%

Chirality and energy transfer amplified circularly polarized luminescence in composite nanohelix

et al. 2017

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Transfer of both chirality and energy information plays an important role in biological systems. Here we show a chiral donor π-gelator and assembled it with an achiral π-acceptor to see how chirality and energy can be transferred in a composite donor–acceptor system. It is found that the individual chiral gelator can self-assemble into nanohelix. In the presence of the achiral acceptor, the self-assembly can also proceed and lead to the formation of the composite nanohelix. In the composite nanohelix, an energy transfer is realized. Interestingly, in the composite nanohelix, the achiral acceptor can both capture the supramolecular chirality and collect the circularly polarized energy from the chiral donor, showing both supramolecular chirality and energy transfer amplified circularly polarized luminescence (ETACPL).

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Section: Resultsmentioning

confidence: 63%

Chirality and energy transfer amplified circularly polarized luminescence in composite nanohelix

et al. 2017

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“…Meanwhile, utilization of state-of-the-art direct nanofabrication techniques based on ion-or electron beam milling for chiral nanostructures fabrication is rather challenging, which triggers, in its turn, search for novel pathways to produce such unique nanostructures. At nanometer scale, fabrication of chiral nanostructures can be provided by assembly of specifically designed chiral molecules via various self-assembling processes [5][6][7][8]. However, the number of the available materials as well as the achievable size of the produced structures are both limited.…”

Section: Introductionmentioning

confidence: 99%

Direct laser printing of chiral plasmonic nanojets by vortex beams

et al. 2017

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Donut-shaped laser radiation, carrying orbital angular momentum, namely optical vortex, recently was shown to provide vectorial mass transfer, twisting transiently molten material and producing chiral micro-scale structures on surfaces of different bulk materials upon their resolidification. In this paper, we show for the first time that nanosecond laser vortices can produce chiral nanoneedles (nanojets) of variable size on thin films of such plasmonic materials, as silver and gold films, covering thermally insulating substrates. Main geometric parameters of the produced chiral nanojets, such as height and aspect ratio, were shown to be tunable in a wide range by varying metal film thickness, supporting substrates, and the optical size of the vortex beam. Donut-shaped vortex nanosecond laser pulses, carrying two vortices with opposite handedness, were demonstrated to produce two chiral nanojets twisted in opposite directions. The results provide new important insights into fundamental physics of the vectorial laser-beam assisted mass transfer in metal films and demonstrate the great potential of this technique for fast easy-to-implement fabrication of chiral plasmonic nanostructures.

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“…Sources directly emitting circularly polarized light (CP) [132][133][134] can be of great interest in many fields, such us quantum computing, [135] optical communication for spintronics, [136] bioresponsive imaging. [137] Generally, non-polarized light is converted in CP light using filters or with more complex systems architectures, [138] which often lead to a loss in brightness.…”

Section: Applications To Organic Light Emission Diodes Technologymentioning

confidence: 99%

Materials and 3D Designs of Helix Nanostructures for Chirality at Optical Frequencies

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et al. 2017

Advanced Optical Materials

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The capability to fully control the chiro‐optical properties of metamaterials has drawn considerable attention due to developments in metamaterial fabrication techniques and a deeper understanding of the light–matter interaction, enabling a number of applications from integrated photonics to life sciences. From simple geometrical studies on single helix shaped metamaterials, both the design complexity and nanofabrication capability are steadily increasing allowing to extend their properties to the visible regime and beyond. In this work, helix‐shaped micro‐ and nanostructures are reviewed, which have the possibility to modulate their optical response in the linear regime at optical frequencies by spatial arrangement or by constitutive material. An overview of different theories describing the general optical operation of chiral media and a discussion on experimental results obtained by the state‐of‐the‐art helix structures realized by different fabrication techniques is provided. Finally, advanced designs for improved functionality envisaged to match practical applications or to enable new optical multifunctionalities are compared. Even if many applications have been envisaged only theoretically, the continuous effort and progress shown by the research community engaged in this field suggests that helical chiral metamaterials could represent a disruptive breakthrough for advanced optical devices.

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Circularly Polarized Luminescence in Chiral Molecules and Supramolecular Assemblies

Cited by 571 publications

References 71 publications

Chirality and energy transfer amplified circularly polarized luminescence in composite nanohelix

Chirality and energy transfer amplified circularly polarized luminescence in composite nanohelix

Direct laser printing of chiral plasmonic nanojets by vortex beams

Materials and 3D Designs of Helix Nanostructures for Chirality at Optical Frequencies

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