Integrated photonic circuits are an integral part of all-optical and on-chip quantum information processing and quantum computer. Deterministically integrated single-photon sources in nanoplasmonic circuits lead to densely packed scalable quantum logic circuits operating beyond the diffraction limit. Here, we report the coupling efficiency of single-photon sources to the plasmonic waveguide, characteristic transmission spectrum, propagation length, decay length, and plasmonic Purcell factor. We simulated the transmission spectrum to find the appropriate wavelength for various width of the dielectric in the metal–dielectric–metal waveguide. We find the maximum propagation length of $3.98\mathrm{\mu }\mathrm{m}$ for Al₂O₃ dielectric-width equal to 140 nm and coupling efficiency to be greater than 82%. The plasmonic Purcell factor was found to be inversely proportional to dielectric-width (w), reaching as high as 31974 for w equal to 1 nm. We also calculated quantum properties of the photons like indistinguishability and found that it can be enhanced by plasmonic-nanocavity if single-photon sources are deterministically coupled. We further, propose a scalable metal–dielectric–metal waveguide based quantum logic circuits using the plasmonic circuit and Mach–Zehnder interferometer.

集成光子电路是全光和片上量子信息处理和量子计算机的组成部分。纳米等离子体电路中确定性集成的单光子源导致密集排列的可扩展量子逻辑电路在衍射极限之外运行。在这里，我们报告了单光子源与等离子体波导的耦合效率、特征传输光谱、传播长度、衰减长度和等离子体珀塞尔因子。我们模拟了传输光谱，以找到适合金属-电介质-金属波导中不同宽度的电介质的波长。我们发现最大传播长度为$3.98\mathrm{\mu }\mathrm{米}$对于Al ₂ O ₃电介质宽度等于140nm并且耦合效率大于82％。发现等离子体珀塞尔因子与电介质宽度 (w) 成反比，当 w 等于 1 nm 时达到 31974。我们还计算了光子的量子特性，如不可区分性，并发现如果单光子源确定性耦合，它可以通过等离子体纳米腔增强。我们进一步提出了一种使用等离子体电路和 Mach-Zehnder 干涉仪的可扩展的基于金属-电介质-金属波导的量子逻辑电路。