A dual-function tunable terahertz multiband bandpass filter based on PET woven-wire meshes with conductive coating surfaces
A multifunctional terahertz (THz) device with frequency tunability, amplitude modulation and spectral filtering abilities, and substrate flexibility is highly desired for various applications, such as THz communication, sensing, wearable optoelectronics. Therefore, this study proposed a 3D artificia...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2024-01-01
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| Series: | Results in Physics |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2211379723010483 |
| _version_ | 1827378216771256320 |
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| author | Ja-Yu Lu Chien-Yu Chen Borwen You |
| author_facet | Ja-Yu Lu Chien-Yu Chen Borwen You |
| author_sort | Ja-Yu Lu |
| collection | DOAJ |
| description | A multifunctional terahertz (THz) device with frequency tunability, amplitude modulation and spectral filtering abilities, and substrate flexibility is highly desired for various applications, such as THz communication, sensing, wearable optoelectronics. Therefore, this study proposed a 3D artificial material based on a flexible polyethylene terephthalate (PET) woven-wire mesh with conductive coating surfaces. This material was conceptually demonstrated in experiments as a dual-functional THz device. In addition, the transmission properties of this artificial material were experimentally and numerically explored with reasonable agreement. Then, the underlying mechanism of the spectral characteristics was qualitatively elucidated. The amplitudes and frequencies of the spectral characteristics were successfully validated to be passively manipulated by tailoring the structural parameters of a unit cell and changing the surface conductivities of a device. This process opened the application feasibility of a frequency tunable bandpass filter and a power switch at the THz regime. For the bandpass filter application, the tri-frequency modulation capability was experimentally demonstrated, and a frequency tuning bandwidth of 0.249 THz was achieved by varying the conductivity of the device’s surface-coating layer from 0.44 to 77 MS/m. For the power switch application, the largest modulation depth between the on and off states of a device was successfully demonstrated at approximately 21.3 dB at 0.271 THz. This dual-function THz device has the advantages of compactness, low cost, and easy fabrication, thus providing an alternative strategy to develop tunable, flexible, and versatile THz devices for broad applications. |
| first_indexed | 2024-03-08T12:52:46Z |
| format | Article |
| id | doaj.art-cbf30eaf51a848deabff53c1d59f7e24 |
| institution | Directory Open Access Journal |
| issn | 2211-3797 |
| language | English |
| last_indexed | 2024-03-08T12:52:46Z |
| publishDate | 2024-01-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Results in Physics |
| spelling | doaj.art-cbf30eaf51a848deabff53c1d59f7e242024-01-20T04:45:08ZengElsevierResults in Physics2211-37972024-01-0156107255A dual-function tunable terahertz multiband bandpass filter based on PET woven-wire meshes with conductive coating surfacesJa-Yu Lu0Chien-Yu Chen1Borwen You2Department of Photonics, National Cheng Kung University, No. 1 University Road, Tainan 70101, Taiwan; Corresponding authors.Department of Photonics, National Cheng Kung University, No. 1 University Road, Tainan 70101, TaiwanDepartment of Physics, National Changhua University of Education, No. 1 Jinde Road, Changhua 500207, Taiwan; Corresponding authors.A multifunctional terahertz (THz) device with frequency tunability, amplitude modulation and spectral filtering abilities, and substrate flexibility is highly desired for various applications, such as THz communication, sensing, wearable optoelectronics. Therefore, this study proposed a 3D artificial material based on a flexible polyethylene terephthalate (PET) woven-wire mesh with conductive coating surfaces. This material was conceptually demonstrated in experiments as a dual-functional THz device. In addition, the transmission properties of this artificial material were experimentally and numerically explored with reasonable agreement. Then, the underlying mechanism of the spectral characteristics was qualitatively elucidated. The amplitudes and frequencies of the spectral characteristics were successfully validated to be passively manipulated by tailoring the structural parameters of a unit cell and changing the surface conductivities of a device. This process opened the application feasibility of a frequency tunable bandpass filter and a power switch at the THz regime. For the bandpass filter application, the tri-frequency modulation capability was experimentally demonstrated, and a frequency tuning bandwidth of 0.249 THz was achieved by varying the conductivity of the device’s surface-coating layer from 0.44 to 77 MS/m. For the power switch application, the largest modulation depth between the on and off states of a device was successfully demonstrated at approximately 21.3 dB at 0.271 THz. This dual-function THz device has the advantages of compactness, low cost, and easy fabrication, thus providing an alternative strategy to develop tunable, flexible, and versatile THz devices for broad applications.http://www.sciencedirect.com/science/article/pii/S2211379723010483Terahertz spectrscopyElectromagnetic wave filterPeriodic metal structureElectromagnetic wave modulation |
| spellingShingle | Ja-Yu Lu Chien-Yu Chen Borwen You A dual-function tunable terahertz multiband bandpass filter based on PET woven-wire meshes with conductive coating surfaces Results in Physics Terahertz spectrscopy Electromagnetic wave filter Periodic metal structure Electromagnetic wave modulation |
| title | A dual-function tunable terahertz multiband bandpass filter based on PET woven-wire meshes with conductive coating surfaces |
| title_full | A dual-function tunable terahertz multiband bandpass filter based on PET woven-wire meshes with conductive coating surfaces |
| title_fullStr | A dual-function tunable terahertz multiband bandpass filter based on PET woven-wire meshes with conductive coating surfaces |
| title_full_unstemmed | A dual-function tunable terahertz multiband bandpass filter based on PET woven-wire meshes with conductive coating surfaces |
| title_short | A dual-function tunable terahertz multiband bandpass filter based on PET woven-wire meshes with conductive coating surfaces |
| title_sort | dual function tunable terahertz multiband bandpass filter based on pet woven wire meshes with conductive coating surfaces |
| topic | Terahertz spectrscopy Electromagnetic wave filter Periodic metal structure Electromagnetic wave modulation |
| url | http://www.sciencedirect.com/science/article/pii/S2211379723010483 |
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