Terahertz Switch Using an Array of Subwavelength Metallic Holes-coupled-disks
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arXiv
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| Format: | Preprint |
| Published: |
2025
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| _version_ | 1866910018316533760 |
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| author | Zarei, Sanaz |
| author_facet | Zarei, Sanaz |
| contents | Broadband switching of terahertz waves at room temperature is demonstrated using a reconfigurable subwavelength metallic hole coupled disk array. The interaction between a metallic membrane featuring periodically arranged circular holes and a substrate bearing a correspondingly periodic array of metallic disks - precisely aligned at their centers - significantly enhances the light coupling within each individual metallic structure, leading to an improved optical transmission and the appearance of a new transmission peak. By mechanical displacement of the metallic membrane with respect to the substrate with metallic disks, the light transmission through the structure can be reconfigured. The device exhibits a polarization-insensitive high-contrast switching performance of 89.4 dB at 942 GHz. The full-width at half-maximum bandwidth of the switch is 288 GHz. By proper design of the device's geometric dimensions, the operation frequency and bandwidth of the switch can be scaled. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2510_18009 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Terahertz Switch Using an Array of Subwavelength Metallic Holes-coupled-disks Zarei, Sanaz Optics Broadband switching of terahertz waves at room temperature is demonstrated using a reconfigurable subwavelength metallic hole coupled disk array. The interaction between a metallic membrane featuring periodically arranged circular holes and a substrate bearing a correspondingly periodic array of metallic disks - precisely aligned at their centers - significantly enhances the light coupling within each individual metallic structure, leading to an improved optical transmission and the appearance of a new transmission peak. By mechanical displacement of the metallic membrane with respect to the substrate with metallic disks, the light transmission through the structure can be reconfigured. The device exhibits a polarization-insensitive high-contrast switching performance of 89.4 dB at 942 GHz. The full-width at half-maximum bandwidth of the switch is 288 GHz. By proper design of the device's geometric dimensions, the operation frequency and bandwidth of the switch can be scaled. |
| title | Terahertz Switch Using an Array of Subwavelength Metallic Holes-coupled-disks |
| topic | Optics |
| url | https://arxiv.org/abs/2510.18009 |