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Ultracompact and unidirectional metallic antennas

机译:超紧凑单向金属天线

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We investigate the angular redistribution of light radiated by a single emitter located in the vicinity of dipolar silver nanoparticles. We point out the fundamental role of the phase differences introduced by the optical path difference between the emitter and the particle and demonstrate that the polarizability of the metallic nanopar-ticle alone cannot predict the emission directionality. In particular, we show that collective or reflective properties of single nanoparticles can be controlled by tuning the distance of a single emitter at a λ/30 scale. These results enable us to design unidirectional and ultracompact nanoantennas composed of just two coupled nanoparticles separated by a distance achievable with biological linkers.
机译:我们研究了位于偶极银纳米颗粒附近的单个发射器辐射的光的角度重新分布。我们指出了由发射极和粒子之间的光程差引起的相位差的基本作用,并证明了仅金属纳米粒子的极化能力无法预测发射方向性。特别地,我们表明可以通过以λ/ 30比例调整单个发射器的距离来控制单个纳米粒子的集体或反射特性。这些结果使我们能够设计单向和超紧凑的纳米天线,该天线仅由两个耦合的纳米颗粒组成,这些纳米颗粒之间的距离可以用生物接头实现。

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