Analysis on the surface-enhanced circular dichroism spectroscopy

Seojoo Lee; Seok Jae Yoo; Q Han Park

Analysis on the surface-enhanced circular dichroism spectroscopy

Seojoo Lee, Seok Jae Yoo, Q Han Park

Department of Physics

Research output: Chapter in Book/Report/Conference proceeding › Conference 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 language	English
Title of host publication	Conference on Lasers and Electro-Optics/Pacific Rim, CLEOPR 2017
Publisher	OSA - The Optical Society
Volume	Part F122-CLEOPR 2017
ISBN (Electronic)	9781557528209
Publication status	Published - 2017 Jan 1
Event	Conference on Lasers and Electro-Optics/Pacific Rim, CLEOPR 2017 - Singapore, Singapore Duration: 2017 Jul 31 → 2017 Aug 4

Other

Other	Conference on Lasers and Electro-Optics/Pacific Rim, CLEOPR 2017
Country	Singapore
City	Singapore
Period	17/7/31 → 17/8/4

Keywords

Biosensing
Chirality
Circular dichroism
Component

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Mechanics of Materials

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title = "Analysis on the surface-enhanced circular dichroism spectroscopy",

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.",

keywords = "Biosensing, Chirality, Circular dichroism, Component",

author = "Seojoo Lee and Yoo, {Seok Jae} and Park, {Q Han}",

year = "2017",

month = jan,

day = "1",

language = "English",

volume = "Part F122-CLEOPR 2017",

booktitle = "Conference on Lasers and Electro-Optics/Pacific Rim, CLEOPR 2017",

publisher = "OSA - The Optical Society",

note = "Conference on Lasers and Electro-Optics/Pacific Rim, CLEOPR 2017 ; Conference date: 31-07-2017 Through 04-08-2017",

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T1 - Analysis on the surface-enhanced circular dichroism spectroscopy

AU - Lee, Seojoo

AU - Yoo, Seok Jae

AU - Park, Q Han

PY - 2017/1/1

Y1 - 2017/1/1

N2 - 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.

AB - 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.

KW - Biosensing

KW - Chirality

KW - Circular dichroism

KW - Component

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M3 - Conference contribution

AN - SCOPUS:85059504681

VL - Part F122-CLEOPR 2017

BT - Conference on Lasers and Electro-Optics/Pacific Rim, CLEOPR 2017

PB - OSA - The Optical Society

T2 - Conference on Lasers and Electro-Optics/Pacific Rim, CLEOPR 2017

Y2 - 31 July 2017 through 4 August 2017

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