Jump to main content
Jump to site search


Enhancing Circular Dichroism by Chiral Hotspots in Silicon Nanocube Dimers

Abstract

Circular dichroism (CD) spectroscopy, which measures the differential absorption of circularly polarized light with opposite handedness, is an important technique to detect and identify chiral molecules in chemistry, biology and life sciences. However, CD signals are normally very small due to the intrinsically weak chirality of molecules. Here we theoretically investigate the generation of chiral hotspots in silicon nanocube dimers for CD enhancement. Up to 15-fold enhancement of the global optical chirality is obtained in the dimer gap, which boosts the CD signal for one order of magnitude without reducing the dissymmetry factor. The origin of this chiral hotspot arises from the simultaneous enhancement of magnetic and electric fields and their proper spatial overlap. Our findings could lead to integrated devices for CD spectroscopy, enantioselective sensing, sorting and synthesis.

Back to tab navigation

Supplementary files

Publication details

The article was received on 31 Jan 2018, accepted on 03 Apr 2018 and first published on 04 Apr 2018


Article type: Paper
DOI: 10.1039/C8NR00902C
Citation: Nanoscale, 2018, Accepted Manuscript
  •   Request permissions

    Enhancing Circular Dichroism by Chiral Hotspots in Silicon Nanocube Dimers

    K. Yao and Y. Liu, Nanoscale, 2018, Accepted Manuscript , DOI: 10.1039/C8NR00902C

Search articles by author

Spotlight

Advertisements