Advanced VO2-Graphene based compact THz absorber for EM shielding and biosensing applications
This paper presents a compact, metal-free THz absorber utilizing VO2 and graphene, offering ultra-wideband absorption (1.0702–13.3 THz) in the conducting state of VO2 and narrow absorption at 6.81 THz in the insulating state. The absorber is tunable by adjusting the chemical potential of graphene an...
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| Format: | Article |
| Language: | English |
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Elsevier
2025-01-01
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| Series: | Ain Shams Engineering Journal |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2090447924006075 |
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| author | Patri Upender P. Sandeep S.Prasanna Bharathi Krishna Kumba Amarjit Kumar |
| author_facet | Patri Upender P. Sandeep S.Prasanna Bharathi Krishna Kumba Amarjit Kumar |
| author_sort | Patri Upender |
| collection | DOAJ |
| description | This paper presents a compact, metal-free THz absorber utilizing VO2 and graphene, offering ultra-wideband absorption (1.0702–13.3 THz) in the conducting state of VO2 and narrow absorption at 6.81 THz in the insulating state. The absorber is tunable by adjusting the chemical potential of graphene and remains polarization-insensitive with over 80% absorption at incidence angles up to 70°. It demonstrates switching between conducting and insulating states, validated through an equivalent electric circuit model. The absorber’s applications include EM interference shielding, stealth, and biosensing, with high sensitivity, figure of merit, and quality factor for detecting cancerous cells and viruses. |
| format | Article |
| id | doaj-art-074058ea1dd246e787760680f582f09e |
| institution | Kabale University |
| issn | 2090-4479 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Ain Shams Engineering Journal |
| spelling | doaj-art-074058ea1dd246e787760680f582f09e2025-01-17T04:49:25ZengElsevierAin Shams Engineering Journal2090-44792025-01-01161103226Advanced VO2-Graphene based compact THz absorber for EM shielding and biosensing applicationsPatri Upender0P. Sandeep1S.Prasanna Bharathi2Krishna Kumba3Amarjit Kumar4School of Electronics Engineering, Vellore Institute of Technology Chennai, Tamil Nadu, 600127, India; Corresponding author.Vignan Institute of Technology, Hyderabad 508284 IndiaSchool of Electronics Engineering, Vellore Institute of Technology Chennai, Tamil Nadu, 600127, IndiaSchool of Electrical Engineering, Vellore Institute of Technology Chennai, Tamil Nadu, 600127, IndiaDepartment of Electronics and Communication, National Institute of Technology, Warangal, Telangana 506004, IndiaThis paper presents a compact, metal-free THz absorber utilizing VO2 and graphene, offering ultra-wideband absorption (1.0702–13.3 THz) in the conducting state of VO2 and narrow absorption at 6.81 THz in the insulating state. The absorber is tunable by adjusting the chemical potential of graphene and remains polarization-insensitive with over 80% absorption at incidence angles up to 70°. It demonstrates switching between conducting and insulating states, validated through an equivalent electric circuit model. The absorber’s applications include EM interference shielding, stealth, and biosensing, with high sensitivity, figure of merit, and quality factor for detecting cancerous cells and viruses.http://www.sciencedirect.com/science/article/pii/S2090447924006075AbsorberBiosensingGraphenePolarizationSensorTHz |
| spellingShingle | Patri Upender P. Sandeep S.Prasanna Bharathi Krishna Kumba Amarjit Kumar Advanced VO2-Graphene based compact THz absorber for EM shielding and biosensing applications Ain Shams Engineering Journal Absorber Biosensing Graphene Polarization Sensor THz |
| title | Advanced VO2-Graphene based compact THz absorber for EM shielding and biosensing applications |
| title_full | Advanced VO2-Graphene based compact THz absorber for EM shielding and biosensing applications |
| title_fullStr | Advanced VO2-Graphene based compact THz absorber for EM shielding and biosensing applications |
| title_full_unstemmed | Advanced VO2-Graphene based compact THz absorber for EM shielding and biosensing applications |
| title_short | Advanced VO2-Graphene based compact THz absorber for EM shielding and biosensing applications |
| title_sort | advanced vo2 graphene based compact thz absorber for em shielding and biosensing applications |
| topic | Absorber Biosensing Graphene Polarization Sensor THz |
| url | http://www.sciencedirect.com/science/article/pii/S2090447924006075 |
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