Optically programmable excitonic traps.

Optically programmable excitonic traps.
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DOI:
10.1038/srep01578
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发表时间:
2013
期刊:
影响因子:
4.6
通讯作者:
Dubin F
Dubin F
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Alloing M;Lemaître A;Galopin E;Dubin F

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在原子系统中,光学程序化的囚禁势导致了量子光学和量子信息科学的显著进展。可编程的捕获电势可能对半导体准粒子,特别是激子的研究产生类似的影响。然而,在半导体异质结构内设计这样的潜力仍然是一个突出的挑战,光学技术尚未实现高度的控制。在这里,我们合成了双层异质结构的间接激子的光学可编程捕获势。我们的方法依赖于被困在一个场效应器件的电荷的注入和空间图案。因此,我们印在原位和按需静电陷阱,我们光学注入冷和密集的激子合奏。这种技术为改进激子集体量子行为研究的最新技术以及新兴激子基光电电路的功能化创造了新的机会。
With atomic systems, optically programmed trapping potentials have led to remarkable progress in quantum optics and quantum information science. Programmable trapping potentials could have a similar impact on studies of semiconductor quasi-particles, particularly excitons. However, engineering such potentials inside a semiconductor heterostructure remains an outstanding challenge and optical techniques have not yet achieved a high degree of control. Here, we synthesize optically programmable trapping potentials for indirect excitons of bilayer heterostructures. Our approach relies on the injection and spatial patterning of charges trapped in a field-effect device. We thereby imprint in-situ and on-demand electrostatic traps into which we optically inject cold and dense ensembles of excitons. This technique creates new opportunities to improve state-of-the-art technologies for the study of collective quantum behavior of excitons and also for the functionalisation of emerging exciton-based opto-electronic circuits.
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