Analysis on the surface-enhanced circular dichroism spectroscopy

Seojoo Lee, Seok Jae Yoo, Q Han Park

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Circular dichroism (CD), the difference in absorption of two opposite circularly polarized light by chiral molecules. Based on the generalized Poynting's theorem for chiral media, we reveal the origin of the CD in the chiral molecule/ nanostructure system. We find that CD enhancement arises through two distinct CD channels - inherent and induced. The inherent CD channel is direct molecular CD enhanced by strongly localized optical helicity density near the nanostructure. The induced CD channel, previously ignored, is asymmetric excitation and absorption of electromagnetic fields inside nanostructures surrounded by chiral molecules. We demonstrate that the induced CD channel can be significant in CD signals of entire system.

Original languageEnglish
Title of host publicationConference on Lasers and Electro-Optics/Pacific Rim, CLEOPR 2017
PublisherOSA - The Optical Society
VolumePart F122-CLEOPR 2017
ISBN (Electronic)9781557528209
Publication statusPublished - 2017 Jan 1
EventConference on Lasers and Electro-Optics/Pacific Rim, CLEOPR 2017 - Singapore, Singapore
Duration: 2017 Jul 312017 Aug 4

Other

OtherConference on Lasers and Electro-Optics/Pacific Rim, CLEOPR 2017
CountrySingapore
CitySingapore
Period17/7/3117/8/4

Keywords

  • Biosensing
  • Chirality
  • Circular dichroism
  • Component

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Mechanics of Materials

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