Journal
ACS NANO
Volume 12, Issue 7, Pages 7327-7334Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsnano.8b03685
Keywords
plasmonic antennas; nanowires; exciton-plasmon coupling; II-VI semiconductors; localized surface plasmon; light emission
Categories
Funding
- National Key Research and Development Program of China [2017YFB0403003]
- National Natural Science Foundation of China [61274058, 61774081, 61322403, 11227904]
- Natural Science Foundation of Jiangsu Province [BK20130013, BK20161401]
- Six Talent Peaks Project in Jiangsu Province [2014XXRJ001]
- Priority Academic Program Development of Jiangsu Higher Education Institutions
- Fundamental Research Funds for the Central Universities [021014380093, 021014380085]
- Australian Research Council
- Funding of Education Department of Guizhou Province, China [KY [2016] 326]
- Research Center of Optical Communications Engineering & Technology, Jiangsu Province [ZXF20170303]
- NUPTSF [NY217121]
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The ability to manipulate light-matter interaction in semiconducting nanostructures is fascinating for implementing functionalities in advanced optoelectronic devices. Here, we report the tailoring of radiative emissions in a ZnTe/ZnTe:O/ZnO core-shell single nanowire coupled with a one-dimensional aluminum bowtie antenna array. The plasmonic antenna enables changes in the excitation and emission processes, leading to an obvious enhancement of near band edge emission (2.2 eV) and subgap excitonic emission (1.7 eV) bound to intermediate band states in a ZnTe/ ZnTe:O/ZnO core-shell nanowire as well as surface-enhanced Raman scattering at room temperature. The increase of emission decay rate in the nanowire/antenna system, probed by time-resolved photoluminescence spectroscopy, yields an observable enhancement of quantum efficiency induced by local surface plasmon resonance. Electromagnetic simulations agree well with the experimental observations, revealing a combined effect of enhanced electric near-field intensity and the improvement of quantum efficiency in the ZnTe/ZnTe:O/ZnO nanowire/antenna system. The capability of tailoring light-matter interaction in low-efficient emitters may provide an alternative platform for designing advanced optoelectronic and sensing devices with precisely controlled response.
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