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Coherent control of radiation patterns of nonlinear multiphoton processes in nanoparticles

机译:纳米颗粒中非线性多光子工艺辐射模式的相干控制

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摘要

We propose a scheme for the coherent control of light waves and currents in metallic nanospheres which applies independently of the nonlinear multiphoton processes at the origin of waves and currents. We derive conditions on the external control field which enable us to change the radiation pattern and suppress radiative losses or to reduce absorption, enabling the particle to behave as a perfect scatterer or as a perfect absorber. The control introduces narrow features in the response of the particles that result in high sensitivity to small variations in the local environment, including subwavelength spatial shifts.
机译:我们提出了一种用于在金属纳米球中的光波和电流的相干控制方案,其独立于波浪和电流起源的非线性多光子过程。我们导出了外部控制领域的条件,使我们能够改变辐射模式并抑制辐射损失或减少吸收,使颗粒能够表现为完美的散射体或作为完美的吸收器。该控制引入颗粒的响应中的窄特征,其导致局部环境中的小变化的高灵敏度,包括亚波长空间偏移。

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