Brightly and directionally luminescent single-walled carbon nanotubes in a wedge cavity
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- Weihang Zhou
- Wuhan National High Magnetic Field Center and School of Physics, Huazhong University of Science and Technology , Wuhan 430074, China
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- Yingjun Zhang
- Wuhan National High Magnetic Field Center and School of Physics, Huazhong University of Science and Technology , Wuhan 430074, China
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- Xinhan Zhang
- Wuhan National High Magnetic Field Center and School of Physics, Huazhong University of Science and Technology , Wuhan 430074, China
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- Chuan Tian
- Wuhan National High Magnetic Field Center and School of Physics, Huazhong University of Science and Technology , Wuhan 430074, China
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- Chunyan Xu
- Wuhan National High Magnetic Field Center and School of Physics, Huazhong University of Science and Technology , Wuhan 430074, China
抄録
<jats:p>Single-walled carbon nanotubes suffer severely from their extremely low luminescence quantum yield and spectral purity. In this work, we produced brightly and directionally luminescent, as well as spectrally pure, carbon nanotubes by embedding them into a wedge-shaped planar cavity. By controlling the detuning between the cavity mode and exciton emission, the photoluminescence of carbon nanotubes could be enhanced up to 60 times. Coupling efficiency, i.e., percentage of nanotube luminescence emitted into a cavity mode, was found to be detuning dependent with a maximum efficiency of ∼54%. Moreover, emission from nanotubes inside the cavity becomes highly directional. The emission angle was measured to be less than 1.8°, demonstrating their great potential in device applications of future optoelectronics.</jats:p>
収録刊行物
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- Applied Physics Letters
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Applied Physics Letters 111 (16), 2017-10-16
AIP Publishing