Nowadays, most of the on-chip plasmonic single-photon sources emit an unpolarized stream of single photons that demand a subsequent polarizer stage in a practical quantum cryptography system. In this paper, we numerically demonstrated the coupling of the light emitted from a quantum emitter (QE) at 700 nm wavelength to the propagation mode supported by an on-chip hybrid plasmonic waveguide (HPW) polarization rotator. Our results proved that the light emitted is linearly polarized at 0^º, 45^º/−45^º, and 90^º with propagation lengths of 5 μm, 3.3 μm, and 3.9 μm, respectively. Moreover, high power-conversion efficiency was obtained from an applied transverse magnetic (TM) mode (0^º-polarization) to a transverse electric (TE) (90^º-polarization) and a linearly polarized light at 45^º/−45^º of 97% and a 98%, respectively. Furthermore, we obtained almost a 3-fold enhancement of the total decay rate of the QE with high emission coupling efficiency (β-factor) of 88%, 80%, and 87% to the corresponding waveguide mode for 0^º, 45^º/−45^º, and 90^º, respectively. Our work paves the way towards more efficient, compact, and less complicated on-chip plasmonic single-photon sources with a specified output polarization.

如今，大多数片上等离激元单光子源会发出非偏振的单光子流，这需要在实际的量子密码系统中进行后续的偏振器阶段。在本文中，我们以数值方式证明了从量子发射器（QE）发出的700 nm波长的光与片上混合等离子波导（HPW）偏振旋转器支持的传播模式的耦合。我们的研究结果证明，所发出的光在0线性偏振^º，45 ^º / -45 ^º和90 ^º为5μm，3.3微米和3.9微米，分别传播长度。此外，通过应用横向磁（TM）模式（^0º极化波），以横向电（TE）（90 ^º极化波），并在45的直线偏振光的光^º / -45 ^º分别为97％和98％。此外，对于^0º，^45º / ，相应的波导模式，我们的QE的总衰减率几乎提高了3倍，而高发射耦合效率（β因子）分别为88％，80％和87％。-45 ^º和90 ^º，分别。我们的工作为具有指定输出偏振的更高效，更紧凑和更简单的片上等离激元单光子源铺平了道路。