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The calculated transmittance spectrum of Au 2DHA with Au film thickness t = 100 nm and period a0 = 1.3 μm and hole radius r = 0.45 μm.
(a) A schematic of the 2DHA device; (b) SEM images of the device with different magnifications; (c) |Ez| in the x-y plane at z = −0.5 μm at the peak transmission wavelength 4.1 μm; (d) |Ez| in the x-z plane at y = 0.65 μm at the peak transmission wavelength 4.1 μm (z = 0 denotes the interface of Au and the sample).
(a) Responsivity spectra of the 2DHA device between 78 K and 300 K; (b) temperature dependence of the responsivity line shape; (c) I-V curves for the 2DHA device from 78 K to 300 K under dark conditions; (d)Johnson noise limited detectivity DJ* at different temperatures.
Peak responsivities of the 2DHA and 45° edge device and quantum efficiency ratios of 2DHA device to 45° polished edge device at different temperatures.
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