3D-Printed Sub-Terahertz Lens for Manipulation of Deflective Quasi-Non-Diffractive OAM Waves
- Publisher:
- IEEE
- Publication Type:
- Conference Proceeding
- Citation:
- Asia-Pacific Microwave Conference Proceedings, APMC, 2022, 2021-November, pp. 332-334
- Issue Date:
- 2022-01-01
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| Filename | Description | Size | |||
|---|---|---|---|---|---|
| 3D-Printed_Sub-Terahertz_Lens_for_Manipulation_of_Deflective_Quasi-Non-Diffractive_OAM_Waves.pdf | Published version | 3.78 MB |
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A 3D-printed sub-terahertz lens for manipulating quasi-non-diffractive orbital angular momentum (OAM) waves is proposed in this paper. The proposed lens comprises all-dielectric elements that impose desired phase profiles on the incident waves by varying their height. Based on the concept of the Bessel beam launchers and the beam deflectors, quasi-non-diffractive OAM waves with a pre-defined deflection angle can be produced by the proposed lens. For verification, two lenses were 3D printed for producing OAM waves with a non-diffractive depth of 55.58λc (λc is the free-space wavelength at 140 GHz). Measured by a terahertz imaging camera, the desired quasi-non-diffractive OAM waves were observed behind the proposed lenses with expected non-diffractive performance and a large deflection angle of up to 47°.
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