论文标题
生成$ {\ rm n00n} $ - 表面等离子体 - 果态与纳米颗粒的状态
Generating ${\rm N00N}$-states of surface plasmon-polariton pairs with a nanoparticle
论文作者
论文摘要
我们考虑在自发参数量子下的介电纳米颗粒的过程中，具有$χ^{（2）} $响应的发光过程。作为一个特别的例子，我们研究了位于银色空气界面上的$ {\ rm gaas} $纳米颗粒的表面等离激元 - 果态对的生成。我们表明，对于某些激发几何，可以获得$ {\ rm n00n} $ - 表面等离子体 - 果态 - 果态对。该效果可以是由于诱导源对之间的量子干扰的结果，每个效果都会发出信号或惰轮等离子体。然后，我们将所得$ {\ rm n00n} $与dyadic green偶极子发射器令人兴奋的表面波的函数的一般对称属性相关联。它将被认为的效果作为一种通用的效果，是一种$ {\ rm n00n} $ - 使用自发参数下转换$χ^{（2）} $纳米颗粒的稳健生成的效果。
We consider a generation of two-particle quantum states in the process of spontaneous parametric down-conversion of light by a dielectric nanoparticle with $χ^{(2)}$ response. As a particular example, we study the generation of surface plasmon-polariton pairs with a ${\rm GaAs}$ nanoparticle located at the silver-air interface. We show that for certain excitation geometries, ${\rm N00N}$-states of surface plasmon-polariton pairs could be obtained. The effect can be physically interpreted as a result of quantum interference between pairs of induced sources, each emitting either signal or idler plasmon. We then relate the resulting ${\rm N00N}$-pattern to the general symmetry properties of dyadic Green's function of a dipole emitter exciting surface waves. It renders the considered effect as a general way towards a robust generation of ${\rm N00N}$-states of surface waves using spontaneous parametric down-conversion in $χ^{(2)}$ nanoparticles.
