Enhanced Optical Chirality through Locally Excited Surface Plasmon Polaritons

Alizadeh, Mohammad Hossein; Reinhard, Björn M.

doi:10.1021/acsphotonics.5b00151

Cited by 23 publications

(24 citation statements)

References 48 publications

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“…Optical chirality has also been discussed, beyond nanoparticles (in the context of propagating surface plasmon waves) and beyond linear optics. Valev et al showed that both the chiral dissymmetry factor g and the second harmonic polarization P i (2ω) are sensitive to the same electric quadrupole terms q ijk = E i ∇ j E k .…”

Section: Chirality Parametersmentioning

confidence: 99%

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Chirality and Chiroptical Effects in Metal Nanostructures: Fundamentals and Current Trends

Collins

Kuppe

Hooper

et al. 2017

Advanced Optical Materials

301

246

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Throughout the 19th and 20th century, chirality has mostly been associated with chemistry. However, while chirality can be very useful for understanding molecules, molecules are not well suited for understanding chirality. Indeed, the size of atoms, the length of molecular bonds and the orientations of orbitals cannot be varied at will. It is therefore difficult to study the emergence and evolution of chirality in molecules, as a function of geometrical parameters. By contrast, chiral metal nanostructures offer an unprecedented flexibility of design. Modern nanofabrication allows chiral metal nanoparticles to tune the geometric and optical chirality parameters, which are key for properties such as negative refractive index and superchiral light. Chiral meta/nano‐materials are promising for numerous technological applications, such as chiral molecular sensing, separation and synthesis, super‐resolution imaging, nanorobotics, and ultra‐thin broadband optical components for chiral light. This review covers some of the fundamentals and highlights recent trends. We begin by discussing linear chiroptical effects. We then survey the design of modern chiral materials. Next, the emergence and use of chirality parameters are summarized. In the following part, we cover the properties of nonlinear chiroptical materials. Finally, in the conclusion section, we point out current limitations and future directions of development.

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Section: Chirality Parametersmentioning

confidence: 99%

“…The recent developments on enhanced chiral response in the near‐field, mediated by excitation of localized surface plasmon polaritons suggest a further development of the potential application of optical forces in chiral systems …”

Section: Chirality Parametersmentioning

confidence: 99%

Chirality and Chiroptical Effects in Metal Nanostructures: Fundamentals and Current Trends

Collins

Kuppe

Hooper

et al. 2017

Advanced Optical Materials

301

246

View full text Add to dashboard Cite

show abstract

“…Undoubtedly, light-matter interaction in chiral plasmonic metal-semiconductor nanohybrid structures will introduce a new field in the sub-field of physical optics. The most significant advantage of such nanohybrid structures is that they enhance chiroptical response, which could be of great interest in a variety of applications related to chiral biosensing, opening up new areas of research 8 . In comparison to natural chiral molecules, chiral plasmonic nanostructures not only lead to large chiroptical effects, but they also introduce entirely new concepts of superchiral light in technological applications.…”

Section: Introductionmentioning

confidence: 99%

Self-assembled Star-shaped Chiroplasmonic Gold Nanoparticles for Ultrasensitive Chiro-immunosensor of Viruses

Ahmed

Nagy

Neethirajan

2017

Preprint

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Near field optics and optical tunneling light-matter interaction in the superstructure of chiral nanostructures and semiconductor quantum dots exhibit strong optical rotation activity that may open a new window for chiral-based bioanalytes detection. Herein we report an ultrasensitive, chiro-immunosensor using superstructure of chiral gold nanohybrids (CAu NPs) and quantum dots (QDs). Self-assembling techniques were employed to create asymmetric plasmonic chiral nanostructures for extending the spectral range of circular dichroism (CD) response for obtaining superior plasmonic resonant coupling with the QDs excitonic state; this may help to achieve lower the limit of detection (LOD) values. As a result, the designed probe exhibited avian influenza A (H5N1) viral concentration at picomolar level, a significant improvement in sensitivity in comparison to a non-assembled CAu NPs based chiroassay. The practicability of the proposed sensing system was successfully demonstrated on several virus cultures including, avian influenza A (H4N6) virus, fowl adenovirus and coronavirus in blood samples. The results of our study highlights that exciton-plasmon interaction changes chirality and the self-assembled nanostructures are an efficient strategy for enhancing the sensitivity of plasmonic nanosensors.

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“…Lateral chiral optical forces that result from transverse SAM are among the major motivations behind this surge in interest in transverse SAM. Such lateral chiral forces appear in opposite directions for chiral objects of opposite handedness [10,[24][25][26][27][28][29][30][31][32][33][34][35][36][37][38][39].…”

Section: Introductionmentioning

confidence: 99%

Emergence of transverse spin in optical modes of semiconductor nanowires

Alizadeh¹,

Reinhard²

2016

Opt. Express

Self Cite

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The transverse spin angular momentum of light has recently received tremendous attention as it adds a new degree of freedom for controlling light-matter interactions. In this work we demonstrate the generation of transverse spin angular momentum by the weakly-guided mode of semiconductor nanowires. The evanescent field of these modes in combination with the transversality condition rigorously accounts for the occurrence of transverse spin angular momentum. The intriguing and nontrivial spin properties of optical modes in semiconductor nanowires are of high interest for a broad range of new applications including chiral optical trapping, quantum information processing, and nanophotonic circuitry.

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Enhanced Optical Chirality through Locally Excited Surface Plasmon Polaritons

Cited by 23 publications

References 48 publications

Chirality and Chiroptical Effects in Metal Nanostructures: Fundamentals and Current Trends

Chirality and Chiroptical Effects in Metal Nanostructures: Fundamentals and Current Trends

Self-assembled Star-shaped Chiroplasmonic Gold Nanoparticles for Ultrasensitive Chiro-immunosensor of Viruses

Emergence of transverse spin in optical modes of semiconductor nanowires

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