Bipolar Photoresponse in Graphene/GaN Heterostructure and its Secure Function in Free‐Space Optical Communication
Abstract The free‐space optical communication is regarded as a promising technique for next generation networks. However, all the data are exposed in free space with high risk of being attacked or eavesdropping by unauthorized parties. Here, a bipolar photodetector based on the graphene/GaN heteroju...
| Main Authors: | , , , , , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Wiley-VCH
2023-10-01
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| Series: | Advanced Electronic Materials |
| Subjects: | |
| Online Access: | https://doi.org/10.1002/aelm.202300243 |
| _version_ | 1797662947590275072 |
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| author | Shifeng Zhang Anqi Hu Qiaoli Liu Li Xu Xiansong Ren Bo Wang Yanling Ren Wenyu Liu Xingye Zhou Shanshan Chen Xia Guo |
| author_facet | Shifeng Zhang Anqi Hu Qiaoli Liu Li Xu Xiansong Ren Bo Wang Yanling Ren Wenyu Liu Xingye Zhou Shanshan Chen Xia Guo |
| author_sort | Shifeng Zhang |
| collection | DOAJ |
| description | Abstract The free‐space optical communication is regarded as a promising technique for next generation networks. However, all the data are exposed in free space with high risk of being attacked or eavesdropping by unauthorized parties. Here, a bipolar photodetector based on the graphene/GaN heterojunction is demonstrated. The polarity of the UV light photocurrent is opposite to that of the red light photocurrent, which results from the interface state filling effect and hot carrier injection into graphene, verified by Kelvin probe force microscope measurement results. Four stable photocurrent levels are demonstrated with only a single graphene/GaN heterojunction via the photocurrent polarity control, which is employed for a secure capability in conventional optical communication by setting visible and UV light as secret and key information, respectively. The technique provides a new strategy to design photodetectors for information encryption technology. |
| first_indexed | 2024-03-11T19:07:28Z |
| format | Article |
| id | doaj.art-a6ac4963de5746f6bfccbd50eeb6b3db |
| institution | Directory Open Access Journal |
| issn | 2199-160X |
| language | English |
| last_indexed | 2024-03-11T19:07:28Z |
| publishDate | 2023-10-01 |
| publisher | Wiley-VCH |
| record_format | Article |
| series | Advanced Electronic Materials |
| spelling | doaj.art-a6ac4963de5746f6bfccbd50eeb6b3db2023-10-10T05:50:39ZengWiley-VCHAdvanced Electronic Materials2199-160X2023-10-01910n/an/a10.1002/aelm.202300243Bipolar Photoresponse in Graphene/GaN Heterostructure and its Secure Function in Free‐Space Optical CommunicationShifeng Zhang0Anqi Hu1Qiaoli Liu2Li Xu3Xiansong Ren4Bo Wang5Yanling Ren6Wenyu Liu7Xingye Zhou8Shanshan Chen9Xia Guo10State Key Laboratory for Information Photonics and Optical Communications School of Electronic Engineering Beijing University of Posts and Telecommunications Beijing 100876 ChinaState Key Laboratory for Information Photonics and Optical Communications School of Electronic Engineering Beijing University of Posts and Telecommunications Beijing 100876 ChinaState Key Laboratory for Information Photonics and Optical Communications School of Electronic Engineering Beijing University of Posts and Telecommunications Beijing 100876 ChinaState Key Laboratory for Information Photonics and Optical Communications School of Electronic Engineering Beijing University of Posts and Telecommunications Beijing 100876 ChinaState Key Laboratory for Information Photonics and Optical Communications School of Electronic Engineering Beijing University of Posts and Telecommunications Beijing 100876 ChinaState Key Laboratory for Information Photonics and Optical Communications School of Electronic Engineering Beijing University of Posts and Telecommunications Beijing 100876 ChinaState Key Laboratory for Information Photonics and Optical Communications School of Electronic Engineering Beijing University of Posts and Telecommunications Beijing 100876 ChinaDepartment of Physics and Beijing Key Laboratory of Optoelectronic Functional Natural Materials & Micro‐nano Devices Renmin University of China Beijing 100872 ChinaNational Key Laboratory of Solid‐State Microwave Devices and Circuits Hebei Semiconductor Research Institute Shijiazhuang 050051 ChinaDepartment of Physics and Beijing Key Laboratory of Optoelectronic Functional Natural Materials & Micro‐nano Devices Renmin University of China Beijing 100872 ChinaState Key Laboratory for Information Photonics and Optical Communications School of Electronic Engineering Beijing University of Posts and Telecommunications Beijing 100876 ChinaAbstract The free‐space optical communication is regarded as a promising technique for next generation networks. However, all the data are exposed in free space with high risk of being attacked or eavesdropping by unauthorized parties. Here, a bipolar photodetector based on the graphene/GaN heterojunction is demonstrated. The polarity of the UV light photocurrent is opposite to that of the red light photocurrent, which results from the interface state filling effect and hot carrier injection into graphene, verified by Kelvin probe force microscope measurement results. Four stable photocurrent levels are demonstrated with only a single graphene/GaN heterojunction via the photocurrent polarity control, which is employed for a secure capability in conventional optical communication by setting visible and UV light as secret and key information, respectively. The technique provides a new strategy to design photodetectors for information encryption technology.https://doi.org/10.1002/aelm.202300243bipolar photoresponsegraphene/GaN heterostructureinterface state filling effectsecure optical communication |
| spellingShingle | Shifeng Zhang Anqi Hu Qiaoli Liu Li Xu Xiansong Ren Bo Wang Yanling Ren Wenyu Liu Xingye Zhou Shanshan Chen Xia Guo Bipolar Photoresponse in Graphene/GaN Heterostructure and its Secure Function in Free‐Space Optical Communication Advanced Electronic Materials bipolar photoresponse graphene/GaN heterostructure interface state filling effect secure optical communication |
| title | Bipolar Photoresponse in Graphene/GaN Heterostructure and its Secure Function in Free‐Space Optical Communication |
| title_full | Bipolar Photoresponse in Graphene/GaN Heterostructure and its Secure Function in Free‐Space Optical Communication |
| title_fullStr | Bipolar Photoresponse in Graphene/GaN Heterostructure and its Secure Function in Free‐Space Optical Communication |
| title_full_unstemmed | Bipolar Photoresponse in Graphene/GaN Heterostructure and its Secure Function in Free‐Space Optical Communication |
| title_short | Bipolar Photoresponse in Graphene/GaN Heterostructure and its Secure Function in Free‐Space Optical Communication |
| title_sort | bipolar photoresponse in graphene gan heterostructure and its secure function in free space optical communication |
| topic | bipolar photoresponse graphene/GaN heterostructure interface state filling effect secure optical communication |
| url | https://doi.org/10.1002/aelm.202300243 |
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