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Tunneling-induced phase grating in quantum dot molecules
Optics Express ( IF 3.8 ) Pub Date : 2020-09-21 , DOI: 10.1364/oe.404566
Yongsheng Hu , Guangling Cheng , Aixi Chen

We present an alternative scheme for the preparation of the phase grating in quantum-dot molecules, where the tunnel coupling occurs between two quantum dots. In the presence of interdot tunneling, the nonlinear dispersion can be significantly enhanced with nearly vanishing linear and nonlinear absorption due to the tunneling-induced quantum coherence. With the help of a standing-wave control field, the weak probe light could be diffracted into high-order direction. It is shown that parameters such as the weak-driving intensity, driving detuning, tunneling strength, and interaction length could be used to adjust the diffraction intensity effectively. Our scheme is focused on the weak standing-wave driving and weak tunneling strength, which may provide an easy and actual way to obtain the phase grating and may have potential applications in quantum-optics and quantum-information-processing devices in the solid-state system.

中文翻译:

量子点分子中的隧道诱导相位光栅

我们提出了一种在量子点分子中制备相位光栅的替代方案,其中隧道耦合发生在两个量子点之间。在存在点间隧穿的情况下,由于隧穿引起的量子相干性,非线性色散可以显着增强,而线性和非线性吸收几乎消失。借助于驻波控制场,弱的探测光可以被衍射到高阶方向。结果表明,弱驱动强度,驱动失谐,隧穿强度和相互作用长度等参数可以有效地调节衍射强度。我们的方案着眼于弱的驻波驱动和弱的隧穿强度,
更新日期:2020-09-28
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