Terahertz(THz)lenses have numerous applications in imaging and communication systems.Currently,the common THz lenses are still based on the traditional design of a circular convex lens.In this work,we present a method...Terahertz(THz)lenses have numerous applications in imaging and communication systems.Currently,the common THz lenses are still based on the traditional design of a circular convex lens.In this work,we present a method for the design of a 3D-printed multilevel THz lens,taking advantage of the benefits offered by 3D printing technology,including compact size,lightweight construction,and cost-effectiveness.The approach utilizes an inverse design methodology,employing optimization methods to promise accurate performance.To reduce simulation time,we employ the finite-difference time-domain method in cylindrical coordinates for near-field computation and couple it with the Rayleigh-Sommerfeld diffraction theory to address far-field calculations.This technology holds great potential for various applications in the field of THz imaging,sensing,and communications,offering a novel approach to the design and development of functional devices operating in the THz frequency range.展开更多
基金supported by the National Key Research and Development Program of China(No.2022YFA1604402)the National Natural Science Foundation of China(NSFC)(Nos.62375011,62005140,92250307,61831012,and 62175118)。
文摘Terahertz(THz)lenses have numerous applications in imaging and communication systems.Currently,the common THz lenses are still based on the traditional design of a circular convex lens.In this work,we present a method for the design of a 3D-printed multilevel THz lens,taking advantage of the benefits offered by 3D printing technology,including compact size,lightweight construction,and cost-effectiveness.The approach utilizes an inverse design methodology,employing optimization methods to promise accurate performance.To reduce simulation time,we employ the finite-difference time-domain method in cylindrical coordinates for near-field computation and couple it with the Rayleigh-Sommerfeld diffraction theory to address far-field calculations.This technology holds great potential for various applications in the field of THz imaging,sensing,and communications,offering a novel approach to the design and development of functional devices operating in the THz frequency range.
