A nanophotonic waveguide based on engineered horizontal and vertical slots is proposed. The proposed engineered structure is composed of three silicon ribs forming two vertical slots, and on top a gold cover in the shape of microchannel forms horizontal slot regions. We are able to increase the bulk sensitivity in TM mode by 1.5 times with the gold cover. The bulk sensitivity for TE and TM mode is reported to be ${1.024}\;{{\rm{nm}}^{- 1}}$ and ${0.95}\;{{\rm{nm}}^{- 1}}$, respectively. Surface sensitivity, investigated numerically, is ${0.265} \times {{10}^{- 2}}\;{\rm{RIU}}/{\rm{nm}}$ for DNA hybridization and ${2.3} \times {{2}}\pi {\rm{/rad}}$ for hepatitis surface antigen detection.

中文翻译：

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基于工程水平-垂直缝隙的纳米光子波导，用于偏振无关的生化传感

提出了一种基于工程水平和垂直缝隙的纳米光子波导。拟议的工程结构由形成两个垂直槽的三个硅肋组成，在顶部的微通道形状的金盖形成水平槽区域。使用金盖，我们可以将TM模式下的体积灵敏度提高1.5倍。据报道，TE和TM模式的总体灵敏度为$ {1.024} \; {{\ rm {nm}} ^ {-1}} $和$ {0.95} \; {{\ rm {nm}} ^ { -1}} $。数值研究的表面灵敏度为$ {0.265} \ times {{10} ^ {-2}} \; {\ rm {RIU}} / {\ rm {nm}} $用于DNA杂交，$ {2.3} \ {{2}} \ pi {\ rm {/ rad}} $进行肝炎表面抗原检测。