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Face detection and alignment in unconstrained environment are challenging due to various poses, illuminations, and occlusions. Recent studies show that deep learning approaches can achieve impressive performance on these two tasks. In this letter, we propose a deep cascaded multitask framework that exploits the inherent correlation between detection and alignment to boost up their performance. In...
We report an observation of cavity modes in a grating plasmonic cavity sandwiching a QWIP in the wavelength range of 10–13 μm. The normal incident light is squeezed into the 0.9 μm-thick subwavelength cavity to form standing wave modes, causing the QWIP photocurrent responses to be 25-fold enhanced comparing with its 45-degree coupled counterpart. The cavity modes are recognized to be localized surface...
Using three methods, i.e., modified photo-induced open-circuit voltage decay method (OCVD), small parallel resistance method and pulse recovery method, the minority carrier lifetime in the base region of Hg1-xCdxTe pn junction devices has been measured at liquid nitrogen temperature. The lifetime is in the range of 18 ap 407 ns for x = 0.231 ap 0.4186, 1 ap 100 ns for x = 0.2234 ap 0.305, and 4 ap...
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