Telecommunication Wavelength-Band Single-Photon Emission from Single Large InAs Quantum Dots Nucleated on Low-Density Seed Quantum Dots.

Telecommunication Wavelength-Band Single-Photon Emission from Single Large InAs Quantum Dots Nucleated on Low-Density Seed Quantum Dots.
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低密度种子量子点上成核的单个大 InAs 量子点的电信波段单光子发射

DOI:
10.1186/s11671-016-1597-0
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发表时间:
2016-12
影响因子:
--
通讯作者:
Niu ZC
Niu ZC
中科院分区:
材料科学3区
文献类型:
--
作者:
Chen ZS;Ma B;Shang XJ;He Y;Zhang LC;Ni HQ;Wang JL;Niu ZC

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在GaAs衬底上,利用应变耦合自组装双层InAs量子点(QDs)实现了通信波段的单光子发射。通过精确控制铟的沉积量和在两层量子点中施加梯度铟通量,在上层制备了低密度的大量子点,其发射波长为~1.3 μm。时间分辨光致发光(PL)强度表明,它们的激子辐射寿命为1.5~ 1.6ns。二阶相关函数g2(0)< 0.5,表明是纯单光子发射。
Single-photon emission in the telecommunication wavelength band is realized with self-assembled strain-coupled bilayer InAs quantum dots (QDs) embedded in a planar microcavity on GaAs substrate. Low-density large QDs in the upper layer active for ~1.3 μm emission are fabricated by precisely controlling the indium deposition amount and applying a gradient indium flux in both QD layers. Time-resolved photoluminescence (PL) intensity suggested that the radiative lifetime of their exciton emission is 1.5~1.6 ns. The second-order correlation function ofg2(0) < 0.5 which demonstrates a pure single-photon emission.
来自共振量子点腔耦合的 1,550 nm 电信频段的快速 Purcell 增强单光子源。
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