Metal Nanoparticle Array as a Tunable Refractive Index Material over Broad Visible and Infrared Wavelengths

Cited 13 time in webofscience Cited 0 time in scopus
  • Hit : 198
  • Download : 0
Common materials show a limited range of refractive indices over the visible and infrared wavelengths, and their values are not easily tunable once the material is chosen. Here, self-assembled metal nanoparticle arrays are proposed as an effective optical material with a large range of possible refractive indices that are nearly dispersionless over broad wavelength ranges. The material can be potentially fabricated over a large curved surface, and the resulting index is even more tunable by various postprocessing methods, such as material substitution or mechanical stretching. We achieve the highest refractive index of 5.0 at resonance in the visible, exceeding 4.2 over a broadband wavelength regime out of resonance. The key differences from previous studies of self assembled metal particle arrays are the consideration of the diamagnetic effect and the careful choice of the ligands, which determine the gaps between particles. The sensitivity of the effective index to the size and material of the gap region allows the use of particle arrays also as an optical sensor of mechanical strain or the densities of analyte solutions with very small reaction volumes.
Publisher
AMER CHEMICAL SOC
Issue Date
2018-04
Language
English
Article Type
Article
Keywords

GOLD; METAMATERIALS; SUPERLATTICES; NANOCRYSTALS; FREQUENCIES; TUNABILITY; DELIVERY; SILICON; ENERGY; GROWTH

Citation

ACS PHOTONICS, v.5, no.4, pp.1188 - 1195

ISSN
2330-4022
DOI
10.1021/acsphotonics.7b01497
URI
http://hdl.handle.net/10203/242270
Appears in Collection
MS-Journal Papers(저널논문)
Files in This Item
There are no files associated with this item.
This item is cited by other documents in WoS
⊙ Detail Information in WoSⓡ Click to see webofscience_button
⊙ Cited 13 items in WoS Click to see citing articles in records_button

qr_code

  • mendeley

    citeulike


rss_1.0 rss_2.0 atom_1.0