论文标题
钻石中氮化中心的伴随优化的纳米级轻萃取器
Adjoint-optimized nanoscale light extractor for nitrogen-vacancy centers in diamond
论文作者
论文摘要
我们设计了一个纳米级的轻萃取器（NLE），以有效地超过和宽带，该宽带光横向散发，由散装钻石发出的浅，带负电荷的氮胶（NV）中心发出。 NLE由钻石上的图案硅层组成，不需要钻石表面蚀刻。我们的设计过程基于使用宽带时域模拟的伴随优化，并产生对定位和制造误差本质上可靠的结构。我们的NLE像NV中心的透射天线一样起作用，增强了从钻石表面以下10 nm的NV中心提取的光电功率，其倍数超过35倍，并将光线放入远场中的+/- 30°锥体。这种光提取方法可以很容易地适应其他固态颜色中心。
We designed a nanoscale light extractor (NLE) for efficient outcoupling and beaming of broadband light emitted by shallow, negatively charged nitrogen-vacancy (NV) centers in bulk diamond. The NLE consists of a patterned silicon layer on diamond and requires no etching of the diamond surface. Our design process is based on adjoint optimization using broadband time-domain simulations and yields structures that are inherently robust to positioning and fabrication errors. Our NLE functions like a transmission antenna for the NV center, enhancing the optical power extracted from an NV center positioned 10 nm below the diamond surface by a factor of more than 35, and beaming the light into a +/-30° cone in the far field. This approach to light extraction can be readily adapted to other solid-state color centers.
