论文标题
带有离散旋转对称性的量子点阵列的扭曲光的发射
Emission of twisted light from quantum dot arrays with a discrete rotational symmetry
论文作者
论文摘要
从理论上讲，我们探索了量子点的圆形阵列的光学性质。我们称之为圆形发射极阵列（CEA）的结构可以通过发射和吸收圆形偏振光以及携带轨道角动量的光的光角动量。得出了带有标线和内部过渡速率的分析表达式，并确定了选择规则。在对CEA进行建模时，仅考虑量子点的关键特性。 This extends the applicability of our model to CEAs composed of a variety of quantum dots.最后，确定了调整CEA特定光学特性的设计原理。这打开了设计超材料的前景，由CEAS的表面组成，该表面会增强光学角动量。
We theoretically explore the optical properties of a circular array of quantum dots. This structure, that we call a circular emitter array (CEA), can exchange optical angular momentum via the emission and absorption of circularly polarised light as well as light carrying orbital angular momentum. Analytical expressions are derived for both interband and intraband transition rates and selection rules are determined. Only the key properties of the quantum dots are considering when modelling the CEA. This extends the applicability of our model to CEAs composed of a variety of quantum dots. Finally design principles for the tuning of the specific optical properties of the CEA are determined. This opens up the prospect of the designing a metamaterial, consisting of a surface of CEAs, that upconverts optical angular momentum.
