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Title: Hot-Carrier-Mediated Photon Upconversion in Metal-Decorated Quantum Wells

Journal Article · · Nano Letters

Manipulating the frequency of electromagnetic waves forms the core of many modern technologies, ranging from imaging and spectroscopy to radio and optical communication. The process of converting photons from higher to lower energy is easily accomplished and technologically widespread. However, upconversion, which is the process of converting lower-energy photons into higher-energy photons, is still a growing field of study with nascent applications and burgeoning interest. Here, we experimentally demonstrate a new photon upconversion technique mediated by hot carriers in plasmonic nanostructures. Hot holes and hot electrons generated via plasmon decay in illuminated metal nanoparticles are injected into an adjacent semiconductor quantum well where they radiatively recombine to emit higher-energy photons. Using GaN/InGaN quantum wells decorated with gold and silver nanoparticles, we show photon upconversion from 2.4 to 2.8 eV. The process scales linearly with illumination power and enables both geometry- and polarization-based tunability. The conversion of plasmonic losses into upconverted optical emission has the potential to impact bioimaging, on-chip wavelength conversion, and high-efficiency photovoltaics.

Research Organization:
Energy Frontier Research Centers (EFRC) (United States). Light-Material Interactions in Energy Conversion (LMI)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
SC0001293
OSTI ID:
1470402
Journal Information:
Nano Letters, Vol. 17, Issue 8; Related Information: LMI partners with California Institute of Technology (lead); Harvard University; University of Illinois, Urbana-Champaign; Lawrence Berkeley National Laboratory; ISSN 1530-6984
Publisher:
American Chemical SocietyCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 25 works
Citation information provided by
Web of Science

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Cited By (7)

“Hot” electrons in metallic nanostructures—non-thermal carriers or heating? journal October 2019
Exciton-plasmon polariton coupling and hot carrier generation in two-dimensional SiB semiconductors: a first-principles study journal February 2020
Assistance of metal nanoparticles in photocatalysis – nothing more than a classical heat source journal January 2019
NIR-to-visible upconversion in quantum dots via a ligand induced charge transfer state journal January 2019
Plasmonic hole ejection involved in plasmon-induced charge separation journal January 2020
Plasmon-induced charge separation at the interface between ITO nanoparticles and TiO 2 under near-infrared irradiation journal January 2019
Affinity-Based Detection of Biomolecules Using Photo-Electrochemical Readout journal September 2019