Leveraging Superchiral Light for Manipulation of Optical Chirality in the Near-Field of Plasmonic Metamaterials

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

Methods for generating enhanced chiroptical response are of great importance in biological and biochemical applications primarily due to the ubiquitous presence of chiral substances in the organic world. Exhibiting an unprecedentedly strong chiroptical response, metamaterials are considered as a good candidate for achieving the highly sought after enhanced optical chirality. Here we demonstrate that optical chirality in the near-field of planar chiral metamaterials can be controlled by the so-called superchiral light composed by two counter-propagating beams of circularly polarized light (CPL) of the opposite handedness. In contrast with the scenario of single CPL excitation, continuous manipulation of optical chirality including the handedness selective enhancement and switching effect is observed. Moreover, the volumetric examination reveals that the enhanced optical chirality is much more delocalized, indicating a further improved accessibility for plasmonic nanostructure based enantiomeric sensing. Finally, we demonstrate the potential of the proposed optical chirality manipulation for optical information processing in a proof-of-concept study involving a coherent imaging system.

Original languageEnglish (US)
Pages (from-to)1298-1305
Number of pages8
JournalACS Photonics
Volume4
Issue number6
DOIs
StatePublished - Jun 21 2017

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Chirality
Metamaterials
chirality
manipulators
near fields
Functional Laterality
Light
handedness
Light polarization
Nanostructures
polarized light
Automatic Data Processing
Optical data processing
Radiation counters
Imaging systems
counters
examination
augmentation
excitation

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Biotechnology
  • Atomic and Molecular Physics, and Optics
  • Electrical and Electronic Engineering

Cite this

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abstract = "Methods for generating enhanced chiroptical response are of great importance in biological and biochemical applications primarily due to the ubiquitous presence of chiral substances in the organic world. Exhibiting an unprecedentedly strong chiroptical response, metamaterials are considered as a good candidate for achieving the highly sought after enhanced optical chirality. Here we demonstrate that optical chirality in the near-field of planar chiral metamaterials can be controlled by the so-called superchiral light composed by two counter-propagating beams of circularly polarized light (CPL) of the opposite handedness. In contrast with the scenario of single CPL excitation, continuous manipulation of optical chirality including the handedness selective enhancement and switching effect is observed. Moreover, the volumetric examination reveals that the enhanced optical chirality is much more delocalized, indicating a further improved accessibility for plasmonic nanostructure based enantiomeric sensing. Finally, we demonstrate the potential of the proposed optical chirality manipulation for optical information processing in a proof-of-concept study involving a coherent imaging system.",
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Leveraging Superchiral Light for Manipulation of Optical Chirality in the Near-Field of Plasmonic Metamaterials. / Kang, Lei; Ren, Qiang; Werner, Douglas Henry.

In: ACS Photonics, Vol. 4, No. 6, 21.06.2017, p. 1298-1305.

Research output: Contribution to journalArticle

TY - JOUR

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AB - Methods for generating enhanced chiroptical response are of great importance in biological and biochemical applications primarily due to the ubiquitous presence of chiral substances in the organic world. Exhibiting an unprecedentedly strong chiroptical response, metamaterials are considered as a good candidate for achieving the highly sought after enhanced optical chirality. Here we demonstrate that optical chirality in the near-field of planar chiral metamaterials can be controlled by the so-called superchiral light composed by two counter-propagating beams of circularly polarized light (CPL) of the opposite handedness. In contrast with the scenario of single CPL excitation, continuous manipulation of optical chirality including the handedness selective enhancement and switching effect is observed. Moreover, the volumetric examination reveals that the enhanced optical chirality is much more delocalized, indicating a further improved accessibility for plasmonic nanostructure based enantiomeric sensing. Finally, we demonstrate the potential of the proposed optical chirality manipulation for optical information processing in a proof-of-concept study involving a coherent imaging system.

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