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Coherent control of metallic nanoparticles near fields: Nanopulse controllers and functional nanoamplifiers

机译:金属纳米粒子在场附近的相干控制:纳米脉冲控制器和功能性纳米放大器

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摘要

When a hybrid system consisting of a metallic nanoparticle and a semiconductor quantum dot interacts with a coherent light source (laser beam) the coherence generated in the quantum dot can significantly renormalize the plasmonic field. In this paper we study the impacts of such coherent-plasmonic processes when such a hybrid system interacts with amplitude-modulated laser fields. We demonstrate how such these processes allow the metallic nanoparticle to act as a nanoarnplifier and a pulse controller for the quantum dot. We show that as a nanopulse controller the metallic nanQparticle can control the shapes of optical pulses experienced by the quantum dot, including dramatic modification of their widths. As a functional nanoamplifier the metallic nanoparticle can enhance high intensity parts of a pulse train while suppressing the parts that their intensities are less than a given value. Therefore, it not only can enhance the amplitudes of the optical pulses but also can make them return-to-zero pulses.
机译:当由金属纳米粒子和半导体量子点组成的混合系统与相干光源(激光束)相互作用时,在量子点中产生的相干性可以显着地使等离子体场正常化。在本文中,我们研究了当此类混合系统与调幅激光场相互作用时,此类相干等离子体处理的影响。我们演示了这些过程如何使金属纳米颗粒充当纳米增强剂和量子点的脉冲控制器。我们表明,作为纳米脉冲控制器,金属nanQparticle可以控制量子点所经历的光脉冲的形状,包括对其宽度的剧烈修改。作为功​​能纳米放大器,金属纳米颗粒可以增强脉冲序列的高强度部分,同时抑制强度小于给定值的部分。因此,它不仅可以增强光脉冲的幅度,而且可以使它们返回零脉冲。

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