Quantum and classical telecommunications require efficient sources of light. Semiconductor sources, owing to the high refractive index of the medium, often exploit photonic cavities to enhance the external emission of photons into a well-defined optical mode. Optical Tamm States (OTSs) in which light is confined between a distributed Bragg reflector and a thin metal layer have attracted interest as confined Tamm structures are readily manufactureable broadband cavities. Their efficiency is limited however by the absorption inherent in the metal layer. We propose a nanoring Tamm structure in which a nanoscale patterned annular metasurface is exploited to reduce this absorption and thereby enhance emission efficiency. To this end, we present designs for a nanoring Tamm structure optimized for the telecommunications O band and demonstrate a near doubling of output efficiency (35%) over an analogous solid disk confined Tamm structure (18%). Simulations of designs optimized for different wavelengths are suggestive of annular coupling between the Tamm state and surface plasmons. These designs are applicable to the design of single photon sources, nano-LEDs, and nanolasers for communications.

中文翻译：

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电信 O 波段中的 Nanoring Tamm 腔


量子和经典电信需要高效的光源。由于介质的高折射率，半导体源通常利用光子腔将光子的外部发射增强为明确的光学模式。光被限制在分布式布拉格反射器和薄金属层之间的光学 Tamm 状态 （OTS） 引起了人们的兴趣，因为受限的 Tamm 结构是易于制造的宽带腔。然而，它们的效率受到金属层固有的吸收的限制。我们提出了一种纳米环 Tamm 结构，其中利用纳米级图案化环形超表面来减少这种吸收，从而提高发射效率。为此，我们提出了针对电信 O 波段优化的纳米环 Tamm 结构的设计，并证明与类似的固体盘限制 Tamm 结构 （18%） 相比，输出效率 （35%） 几乎翻了一番。针对不同波长优化的设计仿真表明 Tamm 态和表面等离激元之间存在环形耦合。这些设计适用于用于通信的单光子源、纳米 LED 和纳米激光器的设计。