1.5 μ m近红外单分散量子点固体的温度调谐实现可控的Forster能量转移
Temperature-tuning of near-infrared monodisperse quantum dot solids at 1.5 um for controllable Forster energy transfer
摘要：
我们提出了第一个时间分辨低温观测福斯特能量转移的大，单分散的硫化铅量子点的基态跃迁近1.5 μ m（0.83 eV），从160 K到室温的环境。用我们的共焦单光子计数装置在1.5 μ m波长下测量，所观察到的温度依赖性偶极-偶极转移速率发生在（30-50 ns）^（-1）的范围内。通过温度调谐的点，94%的共振能量转移效率可以实现供体点。共振传输速率与所提出的理论模型相匹配。
英文摘要：
We present the first time-resolved cryogenic observations of Forster energy transfer in large, monodisperse lead sulphide quantum dots with ground state transitions near 1.5 um (0.83 eV), in environments from 160 K to room temperature. The observed temperature-dependent dipole-dipole transfer rate occurs in the range of (30-50 ns)^(-1), measured with our confocal single-photon counting setup at 1.5 um wavelengths. By temperature-tuning the dots, 94% efficiency of resonant energy transfer can be achieved for donor dots. The resonant transfer rates match well with proposed theoretical models.
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