用于实现基于NV的单光子发射体亚纳秒寿命的介电Fano纳米天线
Dielectric Fano Nanoantennas for Enabling Sub-Nanosecond Lifetimes in NV-based Single Photon Emitters
AI总结：
本文设计制造由硅椭圆与圆盘构成的介电Fano谐振器，通过quasi-BIC与Mie模式杂化耦合NV中心单光子发射体，实现约10倍Purcell增强、亚纳秒寿命和9倍偏振对比度。
摘要：
固态量子发射体是单光子的重要来源，提高其发射速率对于量子通信、量子计算和计量应用至关重要。一种方法是将量子发射体与谐振光子纳米结构耦合，利用Purcell效应增强发射速率。介电纳米天线颇具前景，因为与存在高欧姆损耗的等离子体纳米天线相比，它们能提供强劲的发射增强。本研究中，我们设计并制造了一种基于一对硅（Si）椭圆和一个圆盘的介电Fano谐振器，该结构支持准连续域束缚态（quasi-BIC）与Mie谐振之间的模式杂化。我们通过将所开发的谐振系统与纳米金刚石（NDs）中基于氮空位（NV-）中心的单光子发射体（SPE）对接，展示了其性能。我们观察到，对接后的发射体具有约10的Purcell增强因子、亚纳秒发射寿命以及9的偏振对比度。我们的结果表明，这是一种为集成量子光子学应用开发高效、紧凑单光子源的有前景的方法。
英文摘要：
Solid-state quantum emitters are essential sources of single photons, and enhancing their emission rates is of paramount importance for applications in quantum communications, computing, and metrology. One approach is to couple quantum emitters with resonant photonic nanostructures, where the emission rate is enhanced due to the Purcell effect. Dielectric nanoantennas are promising as they provide strong emission enhancement compared to plasmonic ones, which suffer from high Ohmic loss. Here, we designed and fabricated a dielectric Fano resonator based on a pair of silicon (Si) ellipses and a disk, which supports the mode hybridization between quasi-bound-states-in-the-continuum (quasi-BIC) and Mie resonance. We demonstrated the performance of the developed resonant system by interfacing it with single photon emitters (SPEs) based on nitrogen-vacancy (NV-) centers in nanodiamonds (NDs). We observed that the interfaced emitters have a Purcell enhancement factor of ~10, with sub-ns emission lifetime and a polarization contrast of 9. Our results indicate a promising method for developing efficient and compact single-photon sources for integrated quantum photonics applications.
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