Demonstration of a Highly Efficient Terahertz Flat Lens Employing Tri-Layer Metasurfaces
- Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
- Univ. of Adelaide, SA (Australia)
We demonstrate a terahertz flat lens based on tri-layer metasurfaces allowing for broadband linear polarization conversion, where the phase can be tuned through a full 2π range by tailoring the geometry of the subwavelength resonators. The lens functionality is realized by arranging these resonators to create a parabolic spatial phase profile. The fabricated 124-μm-thick device is characterized by scanning the beam profile and cross section, showing diffraction-limited focusing and ~68% overall efficiency at the operating frequency of 400 GHz. This device has potential for applications in terahertz imaging and communications, as well as beam control in general.
- Research Organization:
- Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
- Sponsoring Organization:
- USDOE Laboratory Directed Research and Development (LDRD) Program; USDOE National Nuclear Security Administration (NNSA); USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22); Australian Research Council (ARC)
- Grant/Contract Number:
- AC52-06NA25396
- OSTI ID:
- 1460638
- Alternate ID(s):
- OSTI ID: 1353304
- Report Number(s):
- LA-UR--17-20891
- Journal Information:
- Optics Letters, Journal Name: Optics Letters Journal Issue: 9 Vol. 42; ISSN 0146-9592
- Publisher:
- Optical Society of America (OSA)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
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