Metasurface-based varifocal Alvarez lens at microwave frequencies
Abstract
Lenses with a tunable focus are highly desirable but remain a challenge. Here, we demonstrate a microwave varifocal meta-lens based on the Alvarez lens principle, consisting of two mechanically movable tri-layer metasurface phase plates with reversed cubic spatial profiles. The manufactured multilayer Alvarez meta-lens enables microwave beam collimation/focusing at frequencies centered at 7.5 GHz, and shows one octave focal length tunability when transversely translating the phase plates by 8 cm. The measurements reveal a gain enhancement up to 15 dB, 3-dB beam width down to 3.5 ∘ , and relatively broad 3-dB bandwidth of 3 GHz. These advantageous characteristics, along with its simplicity, compactness, and lightweightness, make the demonstrated flat Alvarez meta-lens suitable for deployment in many microwave systems.
- Publication Date:
- Research Org.:
- Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
- Sponsoring Org.:
- USDOE Laboratory Directed Research and Development (LDRD) Program; USDOE National Nuclear Security Administration (NNSA); USDOE Office of Science (SC), Basic Energy Sciences (BES). Scientific User Facilities (SUF)
- OSTI Identifier:
- 2278900
- Alternate Identifier(s):
- OSTI ID: 2281526
- Report Number(s):
- LA-UR-23-32118
Journal ID: ISSN 1094-4087; OPEXFF
- Grant/Contract Number:
- 20180062DR; 20220627DI; 20230124ER; 89233218CNA000001
- Resource Type:
- Published Article
- Journal Name:
- Optics Express
- Additional Journal Information:
- Journal Name: Optics Express Journal Volume: 32 Journal Issue: 2; Journal ID: ISSN 1094-4087
- Publisher:
- Optical Society of America
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE; Material Science
Citation Formats
Goldhaber-Gordon, Zev, Tang, Andrew D., Corbella Bagot, Conrad, Mokim, Mohammad, Silva, Sinhara R., Cardin, Andrew E., Azad, Abul K., and Chen, Hou-Tong. Metasurface-based varifocal Alvarez lens at microwave frequencies. United States: N. p., 2024.
Web. doi:10.1364/OE.509837.
Goldhaber-Gordon, Zev, Tang, Andrew D., Corbella Bagot, Conrad, Mokim, Mohammad, Silva, Sinhara R., Cardin, Andrew E., Azad, Abul K., & Chen, Hou-Tong. Metasurface-based varifocal Alvarez lens at microwave frequencies. United States. https://doi.org/10.1364/OE.509837
Goldhaber-Gordon, Zev, Tang, Andrew D., Corbella Bagot, Conrad, Mokim, Mohammad, Silva, Sinhara R., Cardin, Andrew E., Azad, Abul K., and Chen, Hou-Tong. Fri .
"Metasurface-based varifocal Alvarez lens at microwave frequencies". United States. https://doi.org/10.1364/OE.509837.
@article{osti_2278900,
title = {Metasurface-based varifocal Alvarez lens at microwave frequencies},
author = {Goldhaber-Gordon, Zev and Tang, Andrew D. and Corbella Bagot, Conrad and Mokim, Mohammad and Silva, Sinhara R. and Cardin, Andrew E. and Azad, Abul K. and Chen, Hou-Tong},
abstractNote = {Lenses with a tunable focus are highly desirable but remain a challenge. Here, we demonstrate a microwave varifocal meta-lens based on the Alvarez lens principle, consisting of two mechanically movable tri-layer metasurface phase plates with reversed cubic spatial profiles. The manufactured multilayer Alvarez meta-lens enables microwave beam collimation/focusing at frequencies centered at 7.5 GHz, and shows one octave focal length tunability when transversely translating the phase plates by 8 cm. The measurements reveal a gain enhancement up to 15 dB, 3-dB beam width down to 3.5 ∘ , and relatively broad 3-dB bandwidth of 3 GHz. These advantageous characteristics, along with its simplicity, compactness, and lightweightness, make the demonstrated flat Alvarez meta-lens suitable for deployment in many microwave systems.},
doi = {10.1364/OE.509837},
journal = {Optics Express},
number = 2,
volume = 32,
place = {United States},
year = {Fri Jan 05 00:00:00 EST 2024},
month = {Fri Jan 05 00:00:00 EST 2024}
}
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