发明名称 |
High quantum efficiency photodetector |
摘要 |
A photodetector including a photoelectric conversion structure made of a semiconductor material and, on a light-receiving surface of the conversion structure, a stack of first and second diffractive elements, the second element being above the first element, wherein: the first element includes at least one pad made of a material having an optical index n1, laterally surrounded with a region made of a material having an optical index n2 different from n1; the second element includes at least one pad made of a material having an optical index n3, laterally surrounded with a region made of a material having an optical index n4 different from n3; the pads of the first and second elements are substantially vertically aligned; and optical index differences n1−n2 and n3−n4 have opposite signs. |
申请公布号 |
US9640704(B2) |
申请公布日期 |
2017.05.02 |
申请号 |
US201615163550 |
申请日期 |
2016.05.24 |
申请人 |
Commissariat à l'Énergie Atomique et aux Énergies Alternatives;STMicroelectronics SA |
发明人 |
Frey Laurent;Marty Michel |
分类号 |
H01L29/49;H01L31/113;H01L31/0232;H01L31/107;H01L27/146 |
主分类号 |
H01L29/49 |
代理机构 |
Wolf, Greenfield & Sacks, P.C. |
代理人 |
Wolf, Greenfield & Sacks, P.C. |
主权项 |
1. A photodetector comprising a photoelectric conversion structure made of a semiconductor material and, on a light-receiving surface of the conversion structure, a stack of first and second diffractive elements, the second element being above the first element, wherein:
the first element comprises at least one pad made of a material having an optical index n1, laterally surrounded with a region made of a material having an optical index n2 different from n1; the second element comprises at least one pad made of a material having an optical index n3, laterally surrounded with a region made of a material having an optical index n4 different from n3; the pads of the first and second elements are substantially vertically aligned; and optical index differences n1−n2 and n3−n4 have opposite signs. |
地址 |
Paris FR |