论文标题
通过优化的金属腔接近状态局部密度的上限
Approaching the upper limits of the local density of states via optimized metallic cavities
论文作者
论文摘要
通过计算金属底物中空气腔的计算优化，我们表明，状态的局部密度（LDOS）可以达到最近理论上限制的$ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ 10 $的10倍以内，而单极化LDOS的一个因子$ \ 4 $内，这表明理论限制几乎可以实现。优化总LDO会导致自发的对称性破坏，而比将其与特定的极化相结合。此外，简单的形状（例如优化的圆柱体）几乎达到了复杂的多参数Optima的性能，这表明只有一个或两个关键参数很重要，以便接近金属谐振器的理论LDOS界限。
By computational optimization of air-void cavities in metallic substrates, we show that the local density of states (LDOS) can reach within a factor of $\approx 10$ of recent theoretical upper limits, and within a factor $\approx 4$ for the single-polarization LDOS, demonstrating that the theoretical limits are nearly attainable. Optimizing the total LDOS results in a spontaneous symmetry breaking where it is preferable to couple to a specific polarization. Moreover, simple shapes such as optimized cylinders attain nearly the performance of complicated many-parameter optima, suggesting that only one or two key parameters matter in order to approach the theoretical LDOS bounds for metallic resonators.
