Aberration-free flat lens design for a wide range of incident angles

2016 ◽  
Vol 33 (2) ◽  
pp. A66 ◽  
Author(s):  
Arnold Kalvach ◽  
Zsolt Szabó
Keyword(s):  
Lens Design ◽  
Wide Range ◽  
Flat Lens

A New Concept for a Flat Lens Design Using Dielectric Cylinders

2017 ◽  
Vol 65 (11) ◽  
pp. 5720-5731 ◽  
Author(s):  
Eran Falek ◽  
Reuven Shavit
Keyword(s):  
Lens Design ◽  
Flat Lens

scholarly journals Flat lens design using phase correction technique for horn antenna applications

2021 ◽  
Vol 19 (1) ◽  
pp. 213
Author(s):  
Nur Hazimah Syazana Abdul Razak ◽  
Nur Shahira Mat Hussain ◽  
Nurul Hazlina Noordin ◽  
Syamimi Mardiah Shaharum ◽  
Ahmad Syahiman Mohd Shah ◽  
...  
Keyword(s):  
Horn Antenna ◽  
Phase Correction ◽  
Lens Design ◽  
Correction Technique ◽  
Flat Lens

Frequency Tunable Phononic Crystal Flat Lens for Subwavelength Imaging

2021 ◽  
Author(s):  
Hrishikesh Danawe ◽  
Serife Tol
Keyword(s):  
Negative Refraction ◽  
Phononic Crystal ◽  
Ultrasonic Inspection ◽  
Aluminum Plate ◽  
Lens Design ◽  
Lattice Arrangement ◽  
Dispersion Branch ◽  
Small Spot ◽  
Flat Lens ◽  
Frequency Tunable

Abstract In this paper, we present a thickness-contrast based flat lens for subwavelenth imaging in an aluminum plate. The lens is made of phononic crystal (PC) with a triangular lattice arrangement of through holes drilled over an aluminum plate. Subwave-length imaging is achieved by exploiting the concept of negative refraction of A0 plate mode for the optical dispersion branch of the PC. The wavenumbers are matched at a design frequency by creating a step change in the thickness of the PC-lens and host plate. The thickness-contrast results in refractive index of minus one at the interface of the lens and host plate. Negative refraction-based lens overcomes the diffraction limit and enables focusing of flexural waves in an area less than a square wavelength. We validate the flat lens design at a single design frequency through numerical simulations and experiments. Further, we numerically demonstrate the tunability of the lens design over a broadband frequency range by modifying the thickness-contrast between the lens and host plate. The proposed frequency tunable design is promising for many applications such as ultrasonic inspection, tetherless energy transfer, and energy harvesting, where the localization of wave energy in a small spot is desirable.

Ku-band flat lens design for satellite TV applications

2014 ◽  
Author(s):  
Marc Imbert ◽  
Jordi Romeu ◽  
Lluis Jofre ◽  
Anna Papio ◽  
Franco De Flaviis
Keyword(s):  
Lens Design ◽  
Flat Lens ◽  
Ku Band

Flat lens design for mid-IR applications

2013 ◽  
Author(s):  
Nanxi Li ◽  
Jiaqi Luo ◽  
Xia Yu ◽  
Ying Zhang
Keyword(s):  
Lens Design ◽  
Flat Lens

A zoned two-layer flat lens design

2011 ◽  
Author(s):  
Yan Zhang ◽  
Raj. Mittra ◽  
Wei Hong
Keyword(s):  
Lens Design ◽  
Flat Lens
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