DOE OSTI · 3011016
Ultra-Fast 4H-SiC LGAD With Etched Termination and Field Plate
Abstract
The design, fabrication, and demonstration of a novel Silicon Carbide Low Gain Avalanche Detector (4HSiC LGAD), exhibiting an ultra-fast time response and excellent time resolution, are reported. Here, the use of field plates is proposed to suppress the high electric field caused by the negative bevel-etched angle in 4H-SiC LGADs based on TCAD simulations. Experimental measurements confirm that the field plate significantly increases the breakdown voltage of the 4H-SiC LGADs. Gain and time resolution are measured by using the ultraviolet transient current technique (UV-TCT) showing that 4H-SiC LGADs possess excellent timing performance, with a time resolution better than 35 ps for the injected laser signal with single minimum ionizing particle (MIP) charges generation at room temperature. Additionally, the gain suppression effect in a 4H-SiC LGAD is observed for the first time.
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Yang, Tao [Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)] (ORCID:0000000321615808), Sekely, Ben J. [North Carolina State University, Raleigh, NC (United States)] (ORCID:0009000188941926), Satapathy, Yashas [North Carolina State University, Raleigh, NC (United States)], Allion, Greg [North Carolina State University, Raleigh, NC (United States)], Atar, Gil [North Carolina State University, Raleigh, NC (United States)], Barletta, Philip [North Carolina State University, Raleigh, NC (United States)], Haber, Carl [Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)], Holland, Steve [Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)], Muth, John F. [North Carolina State University, Raleigh, NC (United States)] (ORCID:0000000224887721), Pavlidis, Spyridon [North Carolina State University, Raleigh, NC (United States)] (ORCID:0000000216902581), Stucci, Stefania [Brookhaven National Laboratory (BNL), Upton, NY (United States)], Tishelman-Charny, Abraham [Brookhaven National Laboratory (BNL), Upton, NY (United States)]. 2025-03-05. Ultra-Fast 4H-SiC LGAD With Etched Termination and Field Plate. https://doi.org/10.1109/led.2025.3548509
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