Shifeng Zhou, Tomoyo Matsuoka, Yasuhiko Shimotsuma, Masaaki Sakakura, Masayuki Nishi, Zhanglian Hong, Jianrong Qiu, Kazuyuki Hirao and Kiyotaka Miura
This paper reports an asymmetry structure-mediated route for highly localized control of light–matter interactions by using tapered TiO 2 . We demonstrate for the first time that the growth habit of Ag nanostructures on tapered TiO 2 can be tuned by controllable photolysis. Site-selective anchoring of Ag nanoparticles or nanowires on tapered TiO 2 can be achieved by simply changing the external light. We further show that the obtained tapered TiO 2 –Ag hetero-nanostructures present excellent light-trapping ability over a wide range of wavelengths which is considered to originate from the unique synergistic effects of graded waveguiding and plasmonic light trapping. This improved photon-management capability renders the prepared substrate a very promising candidate for optical sensing application. For this purpose, an enhanced sensitivity for trace detection is confirmed. These findings open up promising avenues for tailoring of light–matter...
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This paper reports an asymmetry structure-mediated route for highly localized control of light–matter interactions by using tapered TiO 2 . We demonstrate for the first time that the growth habit of Ag nanostructures on tapered TiO 2 can be tuned by controllable photolysis. Site-selective anchoring of Ag nanoparticles or nanowires on tapered TiO 2 can be achieved by simply changing the external light. We further show that the obtained tapered TiO 2 –Ag hetero-nanostructures present excellent light-trapping ability over a wide range of wavelengths which is considered to originate from the unique synergistic effects of graded waveguiding and plasmonic light trapping. This improved photon-management capability renders the prepared substrate a very promising candidate for optical sensing application. For this purpose, an enhanced sensitivity for trace detection is confirmed. These findings open up promising avenues for tailoring of light–matter...
Link to full article
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