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To improve the performances of AlGaN solar‐blind ultraviolet (UV) avalanche photodetectors (APDs), we propose a separate absorption and multiplication (SAM) AlGaN APD with a gradually doped charge layer. The calculation results indicate that the designed APD can significantly increase the maximum gain by almost 40%, and reduce the breakdown voltage by about 9% compared with the conventional AlGaN...
We theoretically demonstrate that Al(Ga)N nanorod arrays (NRAs) exhibit tunable absorption and achieve selective resonant absorption according to different Al mole factions based on COMSOL Multiphysics via the three‐dimensional finite‐element method. The optical properties of AlxGa1‐xN (x = 0, 0.2, 0.4) NRAs with different geometrical parameters were discussed from the optical absorption and electric...
The seasonal variability of the significant wave height (SWH) in the South China Sea (SCS) is investigated using the most up-to-date gridded daily altimeter data for the period of September 2009 to August 2015. The results indicate that the SWH shows a uniform seasonal variation in the whole SCS, with its maxima occurring in December/January and minima in May. Throughout the year, the SWH in the SCS...
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