Purcell-enhanced emission from individual SiV− center in nanodiamonds coupled to a Si3N4-based, photonic crystal cavity
Purcell-enhanced emission from individual SiV− center in nanodiamonds coupled to a Si3N4-based, photonic crystal cavity
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DOI：
10.1515/nanoph-2020-0257
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发表时间：
2019-10
期刊：
影响因子：
7.5
通讯作者：
Konstantin G. Fehler;A. Ovvyan;L. Antoniuk;Niklas Lettner;N. Gruhler;V. Davydov;V. Agafonov;W. Pernice;A. Kubanek
中科院分区：
文献类型：
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作者：
Konstantin G. Fehler;A. Ovvyan;L. Antoniuk;Niklas Lettner;N. Gruhler;V. Davydov;V. Agafonov;W. Pernice;A. Kubanek
摘要混合量子光子学在后处理步骤中将经典光子学与量子发射器相结合。它有助于将理想的量子光源连接到优化的光子平台。光学腔能够利用Purcell效应提高器件效率。在这里，我们后处理一个独立的，交叉波导光子晶体腔的基础上Si 3 N4与SiV−中心的纳米金刚石。我们开发了一个例程，利用原子力显微镜（AFM）纳米操纵，以达到控制空间和偶极对齐优化与腔电场的重叠。温度调谐进一步提供了对光谱发射器-腔重叠的访问。经过几个优化周期后，我们解析了单个SiV−中心的精细结构，并在单个光学跃迁上实现了超过4的珀塞尔增强，这意味着五分之四的自发发射光子被引入光子器件。我们的工作为构建高效的量子光子器件开辟了新的途径。
Abstract Hybrid quantum photonics combines classical photonics with quantum emitters in a postprocessing step. It facilitates to link ideal quantum light sources to optimized photonic platforms. Optical cavities enable to harness the Purcell-effect boosting the device efficiency. Here, we postprocess a free-standing, crossed-waveguide photonic crystal cavity based on Si3N4 with SiV− center in nanodiamonds. We develop a routine that optimizes the overlap with the cavity electric field utilizing atomic force microscope (AFM) nanomanipulation to attain control of spatial and dipole alignment. Temperature tuning further gives access to the spectral emitter-cavity overlap. After a few optimization cycles, we resolve the fine-structure of individual SiV− centers and achieve a Purcell enhancement of more than 4 on individual optical transitions, meaning that four out of five spontaneously emitted photons are channeled into the photonic device. Our work opens up new avenues to construct efficient quantum photonic devices.