Thang Duy Dao,1* Tadaaki Nagao,1,2* Kai Chen,1 Shatoshi Ishii,1 Gui Han1
1International Center for Materials Nanoarchitectonics (MANA), National Institute for Materials Science (NIMS), 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan
2Condensed Matter Physics, Graduate School of Science, Hokkaido University, Kita 8, Nishi 5, Kita-ku, Sapporo 060-0810, Japan
Nano-Micro Conference, 2017, 1, 01040
Published Online: 25 October 2017 (Abstract)
Optical absorption enhancement using plasmonic structures enables a wide range of applications such as solar energy harvesting devices, light emitting devices and photothermal management. For example, in plasmonic photocatalysis, it has recently attracted great interest in enhancing photocatalytic efficiency not only by the plasmon-enhanced near field but also by the plasmon-enhanced hot-carrier injection, which could boost the visible response of wide bandgap photocatalysts . Here we report measurements and simulations of the efficient sunlight-driven and visible-active photocatalysts composed of plasmonic metals and ZnO nanowire (NW) arrays fabricated via an all-wetchemical route (Figure 1a) . Another application of plasmon-enhanced light absorption is the perfect absorber and thermal emitter . It is found that with proper designs supported by the electromagnetic simulation, the plasmonic structures could exhibit near perfect absorption at desired resonant wavelengths, making them promising for a number of potential application such as thermal emitters (Figure 1b) , molecular sensors  and IR sensors .
Figure 1. (a) Plasmon-mediated photocatalytic activity of ZnO NWs. (b) Plasmonic absorbers for thermal emitters.
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 T. D. Dao; K. Chen; S. Ishii; A. Ohi; T. Nabatame; M. Kitajima; T. Nagao, Infrared Perfect Absorbers Fabricated by Colloidal Mask Etching of Al–Al2O3–Al Trilayers. ACS Photonics. 2, 964-970 (2015). doi:10.1021/acsphotonics.5b00195
 K. Chen; T. D. Dao; S. Ishii; M. Aono; T. Nagao, Infrared Aluminum Metamaterial Perfect Absorbers for Plasmon-Enhanced Infrared Spectroscopy. Advanced Functional Materials. 25, 6637-6643 (2015). doi:10.1002/adfm.201501151
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