期刊
OPTICS EXPRESS
卷 25, 期 24, 页码 A1162-A1171出版社
OPTICAL SOC AMER
DOI: 10.1364/OE.25.0A1162
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资金
- National Science Foundation (NSF) [CBET-1606141, ECCS-0955027]
- Welch Foundation [AT-1617]
- Chinese National Science Foundation (CNSF) [61628402]
- Ministry of Education and Science of the Russian Federation [14. Y26.31.0010]
- NUST [K2-2015-014]
- Increased Competitiveness Program of NUST [K2-2015-014]
Recently, solution-processed hybrid halide perovskite has emerged as promising materials for advanced optoelectronic devices such as photovoltaics, photodetectors, light emitting diodes and lasers. In the mean time, all-dielectric metasurfaces with high-index materials have attracted attention due to their low-loss and high-efficient optical resonances. Because of its tunable by composition band gap in the visible frequencies, organolead halide perovskite could serve as a powerful platform for realizing high-index, low-loss metasurfaces. However, direct patterning of perovskite by lithography-based technique is not feasible due to material instability under moisture. Here we report novel organolead halide perovskite metasurfaces created by the cost-effective thermal nanoimprint technology. The nanoimprinted perovskite metasurface showed improved surface morphology and enhanced optical absorption properties. Significantly enhanced optical emission with an eight-fold enhancement in photoluminescence (PL) intensity was observed under room temperature. Temperature-dependent PL of perovskite nanograting metasurface was also investigated. Based on our results, we believe that thermal nanoimprint is a simple and cost-effective technique to fabricate perovskite-based metasurfaces, which could have broad impact on optoelectronic and photonic applications. (C) 2017 Optical Society of America
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