期刊
NANO LETTERS
卷 15, 期 4, 页码 2700-2704出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.nanolett.5b00407
关键词
LSPR; 2D materials; MOS2; photoluminescence; CVD synthesis
类别
资金
- Materials Research Science and Engineering Center (NSF-MRSEC) of Northwestern University [DMR-1121262]
- McCormick School of Engineering and Applied Sciences at Northwestern University
- AFOSR [FA95500-12-1-0280]
- Institute for Sustainability and Energy at Northwestern (ISEN) through ISEN Equipment and Booster Awards
- NSF-NSEC
- NSF-MRSEC
- Keck Foundation
- State of Illinois
- NUFAB deanroom facility at Northwestern University
Single-layer direct band gap semiconductors such as transition metal dichalcogenides are quite attractive for a wide range of electronics, photonics, and optoelectronics applications. Their monolayer thickness provides significant advantages in many applications such as field-effect transistors for high-performance electronics, sensor/detector applications, and flexible electronics. However, for optoelectronics and photonics applications, inherent monolayer thickness poses a significant challenge for the interaction of light with the material, which therefore results in poor light emission and absorption behavior. Here, we demonstrate enhanced light emission from large-area monolayer MoS2 using plasmonic silver nanodisc arrays, where enhanced photoluminescence up to 12-times has been measured. Observed phenomena stem from the fact that plasmonic resonance couples to both excitation and emission fields and thus boosts the lightmatter interaction at the nanoscale. Reported results allow us to engineer lightmatter interactions in two-dimensional materials and could enable highly efficient photodetectors, sensors, and photovoltaic devices, where photon absorption and emission efficiency highly dictate the device performance.
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