Ultrafast All-Optical Switching Modulation of Terahertz Polarization Conversion Metasurfaces Based on Silicon
Qiangguo Zhou, Qinxi Qiu, Tuntan Wu, Yongzhen Li, Zhiming Huang · 2023
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Description
Qiangguo Zhou and co-authors design in 2023 a terahertz device that flips light polarization across a very wide band, then add light based switching to it. Terahertz waves sit between microwaves and infrared, and steering them fast is a growing need. Their converter uses a two layer patterned surface that turns incoming linear polarization by a right angle with near perfect purity over its band.
Current and field maps explain how the flip works, and the team charts how each shape choice moves performance. They then build silicon into two new designs so a light pump can switch the conversion on and off. Simulations put the switching time well under two nanoseconds for both forms. The work answers a known weakness of fixed patterned converters: they cannot be retuned once made, while these can, at ultrafast speed.
Catalog record
| CREATOR | Qiangguo Zhou, Qinxi Qiu, Tuntan Wu, Yongzhen Li, Zhiming Huang |
|---|---|
| YEAR | 2023 |
| COLLECTION | PAPERS |
| FORMAT | TXT |
| FILE SIZE | 44 KB |
| VERSION | 1.0 |
| LICENSE | CC BY 4.0 |
| RIGHTS | CC BY |
| SOURCE | Europe PMC |