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 |
Fingerprint
Keywords
- Biosensing
- Chirality
- Circular dichroism
- Component
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Mechanics of Materials
Cite this
Lee, S., Yoo, S. J., & Park, Q. H. (2017). Analysis on the surface-enhanced circular dichroism spectroscopy. In Conference on Lasers and Electro-Optics/Pacific Rim, CLEOPR 2017 (Vol. Part F122-CLEOPR 2017). [s1332] OSA - The Optical Society.