Department of Engineering Physics, McMaster University, Hamilton, Ontario, Canada, L8S4L7.
Nanotechnology. 2016 Aug 5;27(31):315202. doi: 10.1088/0957-4484/27/31/315202. Epub 2016 Jun 21.
A periodic array of vertical InSb nanowires (nws) was designed for photodetectors in the mid-wavelength infrared (MWIR) region (λ = 3-5 μm). Simulations, using the finite element method, were implemented to optimize the nw array geometrical parameters (diameter (D), period (P), and length (L)) for high optical absorptance, which exceeded that of a thin film of equal thickness. Our results showed HE1n resonances in InSb nw arrays can be tuned by adjusting D and P, thus enabling multispectral absorption throughout the near infrared to MWIR region. Optical absorptance was investigated for a practical photodetector consisting of a vertical InSb nw array embedded in bisbenzocyclobutene (BCB) as a support layer for an ultrathin Ni contact layer. Polarization sensitivity of the photodetector is examined.
周期性的垂直 InSb 纳米线（nws）阵列被设计用于中波红外（MWIR）区域（λ=3-5μm）的光电探测器。使用有限元方法进行了模拟，以优化 nw 阵列的几何参数（直径（D）、周期（P）和长度（L）），以实现高光吸收，超过了具有相同厚度的薄膜的光吸收。我们的结果表明，通过调整 D 和 P，可以调谐 InSb nw 阵列中的 HE1n 共振，从而实现近红外到 MWIR 区域的多光谱吸收。研究了由嵌入双苯并环丁烯（BCB）中的垂直 InSb nw 阵列组成的实用光电探测器的光吸收率，作为超薄 Ni 接触层的支撑层。还检查了光电探测器的偏振灵敏度。
