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Demonstration of a Highly Efficient Terahertz Flat Lens Employing Tri-Layer Metasurfaces

Journal Article · · Optics Letters
DOI:https://doi.org/10.1364/OL.42.001867· OSTI ID:1460638

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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Cited By (7)

Empowered Layer Effects and Prominent Properties in Few‐Layer Metasurfaces journal March 2019
Terahertz Reflectarray with Enhanced Bandwidth journal July 2019
Terahertz Diffractive Optics—Smart Control over Radiation journal April 2019
Invited Article: Narrowband terahertz bandpass filters employing stacked bilayer metasurface antireflection structures journal May 2018
Tutorial: Terahertz beamforming, from concepts to realizations journal May 2018
Multifocal terahertz lenses realized by polarization-insensitive reflective metasurfaces journal March 2019
Unveiling the Properties of Metagratings via a Detailed Analytical Model for Synthesis and Analysis journal November 2017

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