Photoluminescence Enhancement of CuInS2 Quantum Dots in Solution Coupled to Plasmonic Gold Nanocup Array

Peer, Akshit; Hu, Zhongjian; Singh, Ajay; Hollingsworth, Jennifer A.; Biswas, Rana; Htoon, Han

doi:10.1002/smll.201700660

Photoluminescence Enhancement of CuInS₂ Quantum Dots in Solution Coupled to Plasmonic Gold Nanocup Array

Journal Article · Wed Jul 05 00:00:00 EDT 2017 · Small

DOI:https://doi.org/10.1002/smll.201700660· OSTI ID:1396273

Peer, Akshit ^[1]; ^[2]; Singh, Ajay ^[2]; Hollingsworth, Jennifer A. ^[2]; Biswas, Rana ^[1]; Htoon, Han ^[2]

Ames Lab. and Iowa State Univ., Ames, IA (United States)
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)

A strong plasmonic enhancement of photoluminescence (PL) decay rate in quantum dots (QDs) coupled to an array of gold-coated nanocups is demonstrated. CuInS2 QDs that emit at a wavelength that overlaps with the extraordinary optical transmission (EOT) of the gold nanocup array are placed in the cups as solutions. Time-resolved PL reveals that the decay rate of the QDs in the plasmonically coupled system can be enhanced by more than an order of magnitude. Using finite-difference time-domain (FDTD) simulations, it is shown that this enhancement in PL decay rate results from an enhancement factor of ≈100 in electric field intensity provided by the plasmonic mode of the nanocup array, which is also responsible for the EOT. The simulated Purcell factor approaches 86 at the bottom of the nanocup and is ≈3–15 averaged over the nanocup cavity height, agreeing with the experimental enhancement result. In conclusion, this demonstration of solution-based coupling between QDs and gold nanocups opens up new possibilities for applications that would benefit from a solution environment such as biosensing.

View Accepted Manuscript (DOE)

Research Organization:: Ames Laboratory (AMES), Ames, IA (United States); Los Alamos National Lab. (LANL), Los Alamos, NM (United States)

Sponsoring Organization:: USDOE

Grant/Contract Number:: AC02-07CH11358; AC52-06NA25396; NA0003525

OSTI ID:: 1396273

Alternate ID(s):: OSTI ID: 1409783
OSTI ID: 1378154

Report Number(s):: IS-J--9443; LA-UR--17-25520

Journal Information:: Small, Journal Name: Small Journal Issue: 33 Vol. 13; ISSN 1613-6810

Publisher:: WileyCopyright Statement

Country of Publication:: United States

Language:: English

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Characterization of extraordinary transmission through conducting screens pierced by arrays of rectangular flared holes for quantitative comparison among various taper profiles and study of metal losses Ng Mou Kehn, Malcolm; Lai, Wei-Yu OSA Continuum, Vol. 2, Issue 9 https://doi.org/10.1364/osac.2.002728	journal	January 2019
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Related Subjects

36 MATERIALS SCIENCE
77 NANOSCIENCE AND NANOTECHNOLOGY
Inorganic and Physical Chemistry
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Purcell enhancement
nanophotonics
optical transmission
plasmonic structure
quantum dots
optical spectroscopy
photoluminescence
plasmonics
quantum dots