Results 31 to 40 of about 233 (127)
Advanced Optical Materials, Volume 9, Issue 6, March 18, 2021., 2021 This article reports an ultrathin light‐field camera (ULFC) using a metal–insulator–metal optical absorber based inverted microlens arrays (MIM‐iMLA) for high contrast and high‐resolution light‐field image acquisition. MIM‐iMLA double the image contrast, and the rendered ULFC image shows an MTF50 value improvement of 32%.
Sang‐In Bae +4 more
wiley +1 more source
Non-diffracting beam generated from a photonic integrated circuit based axicon-like lens [PDF]
, 2021 We demonstrate an on-chip silicon-on-insulator (SOI) device to generate a non-diffracting beam of ≈850 µm length from a diffractive axicon-like lens etched using a low resolution (200 nm feature size, 250 nm gap) deep-ultraviolet lithographic fabrication.
Bhattarai, Pravin +7 more
core +2 more sources
A review of dielectric optical metasurfaces for wavefront control [PDF]
, 2018 During the past few years, metasurfaces have been used to demonstrate optical elements and systems with capabilities that surpass those of conventional diffractive optics.
Arbabi, Amir +3 more
core +3 more sources
, 2023 SF$_6$ is widely used as a gas-insulator in high-voltage power electrical system. Detecting SF$_6$ leaks using unmanned aerial vehicle (UAV)-based thermal cameras allows efficient large-scale inspections during routine maintenance.
Chen, Haohan +6 more
core +1 more source
Optical Trapping and Separation of Metal Nanoparticles by Cylindrical Metalenses With Phase Gradients [PDF]
, 2020 We proposed a method for driving metal nanoparticles in the focal field by cylindrical metalens with phase gradient. It was found that the introduced gradient phase would not affect the formation of the focal line, where metal nanoparticles can be ...
Liu, Hongchao +3 more
core +1 more source
Tripling the Capacity of Optical Vortices by Nonlinear Metasurface [PDF]
, 2018 Optical vortices have emerged as a potential approach to enhance data capacity for its extra degree of freedom of orbital angular momentum. Although linear metasurfaces have been used to generate optical vortices, their capacity can be further increased ...
Chen, Shuqi +8 more
core +1 more source
Geometric Metasurfaces for Ultrathin Optical Devices [PDF]
, 2018 Metasurfaces, planar metamaterials consisting of a single layer or several layers of artificial structures, not only form the basis for fundamental physics research but also have considerable technological significance.
Chen, Shuqi +4 more
core +4 more sources
Recent Progress in Far-Field Optical Metalenses [PDF]
, 2017 In this chapter, a review of the recent advances in optical metalenses is presented, with special emphasis in their experimental implementation. First, the Huygens’ principle applied to ultrathin engineered metamaterials is introduced for the purpose of ...
Hashemi, Mahdieh +2 more
core +2 more sources
Realising superoscillations: A review of mathematical tools and their application [PDF]
, 2020 Superoscillations are making a growing impact on an ever-increasing number of real-world applications, as early theoretical analysis has evolved into wide experimental realisation.
Aharonov Y +30 more
core +1 more source
Vanadium dioxide thin films-assisted terahertz meta-surface for simultaneous absorption, polarization conversion bi-functional switching, and wavefront operation [PDF]
, 2023 Actively switchable metasurfaces are extremely useful for achieving a multifunctional integrated platform. The proposed design enables functional switching through the temperature-induced phase transition features of vanadium dioxide (VO2).
Abbas, M. +7 more
core +1 more source