论文标题
部分可观测时空混沌系统的无模型预测
Purcell and collection efficiency enhancement of single NV- center emission coupled to an asymmetric Tamm structure
论文作者
论文摘要
储层计算是预测湍流的有力工具，其简单的架构具有处理大型系统的计算效率。然而，其实现通常需要完整的状态向量测量和系统非线性知识。我们使用非线性投影函数将系统测量扩展到高维空间，然后将其输入到储层中以获得预测。我们展示了这种储层计算网络在时空混沌系统上的应用，该系统模拟了湍流的若干特征。我们表明，使用径向基函数作为非线性投影器，即使只有部分观测并且不知道控制方程，也能稳健地捕捉复杂的系统非线性。最后，我们表明，当测量稀疏、不完整且带有噪声，甚至控制方程变得不准确时，我们的网络仍然可以产生相当准确的预测，从而为实际湍流系统的无模型预测铺平了道路。
The resonant modes associated with engineered photonic structures of different spatial-dimension are essential to obtain bright on-demand single photon sources for quantum technologies. Negatively-charged nitrogen-vacancy (NV-) center in diamond is proposed as an excellent single photon source at room temperature. The possible optical readout of spin states in diamond makes it a good candidate for spin-photon interface. However, the poor light collection, feeble zero-phonon line, low emission rate, and the presence of broad phonon-induced emission limits the use of NV- center in quantum technologies. Here, we present a feasible, easy to fabricate, asymmetric Tamm structure coupled with single NV- center to enhance the emission rate of zero phonon line (ZPL) with better light collection efficiency. The asymmetric Tamm structure shows dual resonant mode with one of the modes coinciding with NV- ZPL wavelength of 640 nm. The quality factor (Q-factor) of the mode is 140 which is far better than the Q-factor of conventional Tamm structure and hence, better field intensity localization. We achieve four times Purcell enhancement along with an enhanced light collection efficiency of five times at 640 nm. The proposed structure is useful for generating bright single photons using NV- center and an efficient spin-photon interface.
