We report a sub-wavelength transmission surface grating (TSG) enhanced longwave infrared (LWIR) quantum dot photodetector. Broadband photocurrent enhancement covering the wavelength range from 4 μm to 11 μm is observed. A 4.6 times (4.6×) photocurrent enhancement is obtained at the photodetection wavelength of 8.7 μm. By comparing the simulated diffraction efficiency with the photocurrent enhancement spectrum, we attribute the enhancement to the 1st-order diffraction of the normal infrared (IR) incidence radiation. The photodetectivity (D*) enhancement at different biases is also measured and analyzed.
No takes yet. Share an insight, caveat, or question.
Vasinajindakaw et al. (2013) studied this question.
Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context: