Taminiau Tim H, Stefani Fernando D, van Hulst Niek F
ICFO - Institut de Ciences Fotoniques, Mediterranean Technology Park, 08860 Castelldefels (Barcelona), Spain.
Opt Express. 2008 Jul 7;16(14):10858-6. doi: 10.1364/oe.16.010858.
We demonstrate by 3D numerical calculations that the interaction of a single quantum emitter with the electromagnetic field is both enhanced and directed by a nano-optical Yagi-Uda antenna. The single emitter is coupled in the near field to the resonant plasmon mode of the feed element, enhancing both excitation and emission rates. The angular emission of the coupled system is highly directed and determined by the antenna mode. Arbitrary control over the main direction of emission is obtained, regardless of the orientation of the emitter. The directivity is even more increased by the presence of a dielectric substrate, making such antennas a promising candidate for compact easy-to-address planar sensors.
我们通过三维数值计算证明，单个量子发射器与电磁场的相互作用会被纳米光学八木 - 宇田天线增强并定向。单个发射器在近场中与馈电元件的共振等离子体模式耦合，从而提高激发和发射速率。耦合系统的角发射具有高度定向性，并由天线模式决定。无论发射器的取向如何，都能对发射的主方向进行任意控制。电介质衬底的存在进一步提高了方向性，使此类天线成为紧凑型易于寻址平面传感器的有前景的候选者。
