{"title":"HR-GaAs:Cr电离辐射传感器的空穴光电流动力学","authors":"M. S. Trofimov, I. D. Chsherbakov","doi":"10.1007/s11182-025-03475-3","DOIUrl":null,"url":null,"abstract":"<div><p>The results of a study of hole transport in chromium-compensated gallium arsenide (HR-GaAs:Cr) sensors using a transient current technique and a numerical simulation of the photoresponse of an HR-GaAs:Cr sensor to a single pulse of infrared radiation are presented. The objects of research are the HR-GaAs:Cr sensors with a mesh metal contact to which a positive potential is applied. It is established that when the sensor is irradiated from the mesh anode, the electrons drift in the horizontal direction to the sensor strips, leading to the formation of a photocurrent pulse in the electrical circuit with a duration shorter than 1 ns. The observed areas of exponential decay of the photocurrent at the pulse trailing edges are attributed to the drift of holes towards the sensor cathode, accompanied by their capture by negatively charged chromium centers. Based on the results obtained, the lifetime of holes in the samples under study is determined.</p></div>","PeriodicalId":770,"journal":{"name":"Russian Physics Journal","volume":"68 4","pages":"632 - 638"},"PeriodicalIF":0.4000,"publicationDate":"2025-05-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Hole photocurrent dynamics in HR-GaAs:Cr ionizing radiation sensors\",\"authors\":\"M. S. Trofimov, I. D. Chsherbakov\",\"doi\":\"10.1007/s11182-025-03475-3\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>The results of a study of hole transport in chromium-compensated gallium arsenide (HR-GaAs:Cr) sensors using a transient current technique and a numerical simulation of the photoresponse of an HR-GaAs:Cr sensor to a single pulse of infrared radiation are presented. The objects of research are the HR-GaAs:Cr sensors with a mesh metal contact to which a positive potential is applied. It is established that when the sensor is irradiated from the mesh anode, the electrons drift in the horizontal direction to the sensor strips, leading to the formation of a photocurrent pulse in the electrical circuit with a duration shorter than 1 ns. The observed areas of exponential decay of the photocurrent at the pulse trailing edges are attributed to the drift of holes towards the sensor cathode, accompanied by their capture by negatively charged chromium centers. Based on the results obtained, the lifetime of holes in the samples under study is determined.</p></div>\",\"PeriodicalId\":770,\"journal\":{\"name\":\"Russian Physics Journal\",\"volume\":\"68 4\",\"pages\":\"632 - 638\"},\"PeriodicalIF\":0.4000,\"publicationDate\":\"2025-05-28\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Russian Physics Journal\",\"FirstCategoryId\":\"101\",\"ListUrlMain\":\"https://link.springer.com/article/10.1007/s11182-025-03475-3\",\"RegionNum\":4,\"RegionCategory\":\"物理与天体物理\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q4\",\"JCRName\":\"PHYSICS, MULTIDISCIPLINARY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Russian Physics Journal","FirstCategoryId":"101","ListUrlMain":"https://link.springer.com/article/10.1007/s11182-025-03475-3","RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"PHYSICS, MULTIDISCIPLINARY","Score":null,"Total":0}
Hole photocurrent dynamics in HR-GaAs:Cr ionizing radiation sensors
The results of a study of hole transport in chromium-compensated gallium arsenide (HR-GaAs:Cr) sensors using a transient current technique and a numerical simulation of the photoresponse of an HR-GaAs:Cr sensor to a single pulse of infrared radiation are presented. The objects of research are the HR-GaAs:Cr sensors with a mesh metal contact to which a positive potential is applied. It is established that when the sensor is irradiated from the mesh anode, the electrons drift in the horizontal direction to the sensor strips, leading to the formation of a photocurrent pulse in the electrical circuit with a duration shorter than 1 ns. The observed areas of exponential decay of the photocurrent at the pulse trailing edges are attributed to the drift of holes towards the sensor cathode, accompanied by their capture by negatively charged chromium centers. Based on the results obtained, the lifetime of holes in the samples under study is determined.
期刊介绍：
Russian Physics Journal covers the broad spectrum of specialized research in applied physics, with emphasis on work with practical applications in solid-state physics, optics, and magnetism. Particularly interesting results are reported in connection with: electroluminescence and crystal phospors; semiconductors; phase transformations in solids; superconductivity; properties of thin films; and magnetomechanical phenomena.
求助内容：
应助结果提醒方式：
京公网安备 11010802042870号
