Abstract—

The mechanism of enhancing the interaction of optical radiation with a superconducting niobium nitride film on the surface of optical waveguides on a lithium niobate substrate using an additional cover layer with a high refractive index has been studied. It has been shown that adiabatic deformation of waveguide modes allows increasing the absorption of light in a superconducting film to the level of ∼1 dB/μm, which makes it possible to manufacture a single photon detector with a quantum efficiency of about 70% on lithium niobate.

中文翻译：

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通过附加的高折射率覆盖层提高铌酸锂基板上集成光学超导单光子探测器的效率

摘要-

已经研究了使用附加的具有高折射率的覆盖层来增强光辐射与铌酸锂基板上光波导表面上的超导氮化铌膜相互作用的机制。已经表明，波导模式的绝热变形可以使超导膜中的光吸收增加到〜1 dB /μm的水平，这使得可以制造在锂上量子效率约为70％的单光子探测器。铌酸盐。