Graphene-based ultrathin flat lenses
WebThe concept of optical phase discontinuities is applied to the design and demonstration of aberration-free planar lenses and axicons, comprising a phased array of ultrathin subwavelength-spaced optical antennas. The lenses and axicons consist of V-shaped nanoantennas that introduce a radial distribution of phase discontinuities, thereby … WebMar 13, 2024 · Laser-induced graphene (LIG) has garnered tremendous attention in the past decade as a flexible, scalable, and patternable alternative for fabricating electronic sensors. Superhydrophobic and superhydrophilic variants of LIG have been demonstrated by previous studies. However, stability analysis of the superhydrophobic surface property …
Graphene-based ultrathin flat lenses
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WebIn this paper we present flat and ultra-thin lenses based on graphene, the world’s thinnest known material. Monolayers and low number multilayers of graphene were ... The … WebJun 11, 2024 · Optical phased arrays (OPAs) are essential optical elements in applications that require the ability to manipulate the light-wavefront, such as beam focusing and light steering. To miniaturize the optical components, active metasurfaces, especially graphene metasurfaces, are used as competent alternatives. However, the metasurface cannot …
WebOct 15, 2024 · 2016年. 49. Shuqi Chen*, Wenwei Liu, Zhancheng Li, Hua Cheng, and Jianguo Tian, “Polarization State Manipulation of Electromagnetic Waves with Metamaterials and Its Applications in Nanophotonics,” Book chapter in Metamaterials - Devices and Advanced Applications, IN-TECH, ISBN. 978-953-51-3100-7 (2016). WebGraphene absorbers have attracted lots of interest in recent years. They provide huge potential for applications such as photodetectors, modulators, and thermal emitters. In this letter, we design a high-quality (Q) factor resonant graphene absorber based on the phase change material Sb2S3. In the proposed structure, a refractive index grating is formed at …
WebMar 23, 2024 · The ever-increasing demand for miniaturized optical systems has placed stringent requirements on the core element: lenses. Developing ultrathin flat lenses with a varifocal capability and broadband spectral response is critical for diverse applications, but remains challenging and has been the focus of intensive research. WebJan 1, 2015 · Finally, the theoretical fabrication of a straight line interferometer, L-shaped optical waveguide and T-shaped optical …
WebAn example of a contact lens of size suitable for the human eye is depicted in Figure 18, which is based on a flexible polymer substrate and covered with a transparent graphene electrode on the curved active part of the contact lens. Above a threshold voltage of approximately 2 V, the optical power changes continuously up to 0.7 D, which allows ...
WebHTML. Introduction. Traditional tuneable lenses 1 consisting of complex lenses with manipulation systems have limited designs because of the spatial occupancy, which eventually confines their applications in advanced pixel-based devices, such as flat panel displays. Ultrathin flat lenses, which are different from conventional lenses, have been … how many sea animals die from trash each yearWebGraphene nanostructures exhibit an unprecedentedly large nonlinear optical response, enabling the generation of new optical frequencies made up of different linear combinations of the incident light frequencies. The image illustrates this concept with an armchair-edged graphene nanotriangle, for which Cox and García de Abajo predict that tunable, … how did bucky barnes live so longWebJun 5, 2024 · Graphene-based ultrathin lenses with an electrically tuneable focal length could prove useful for providing displays with autostereoscopic 3D functionality, multiview or privacy protection ... We would like to show you a description here but the site won’t allow us. how did buckwheat dieWebA flat lens is a lens whose flat shape allows it to provide distortion-free imaging, potentially with arbitrarily-large apertures. The term is also used to refer to other lenses that provide a negative index of refraction. Flat lenses require a refractive index close to −1 over a broad angular range. In recent years, flat lenses based on metasurfaces were also … how did bucky end up in wakandaWebFeb 1, 2016 · The graphene lens developed at Swinburne University of Technology is one billionth of a meter thick ... This material allowed the team to make ultrathin flat lenses that are 300 times thinner than ... how many sea animals are thereWebJul 7, 2024 · Spatial occupancy presents design limitations in conventional tunable lenses containing complex lenses with a manipulation system, ultimately limiting the applications of these lenses in next ... how did bucky live through 70 yearsWebWe report the performance of a graphene-enhanced THz grating fabricated by depositing a gold layer on the femtosecond micromachined SiO2 substrate. The morphology of the gold plated patterned substrate was studied by scanning electron microscopy (SEM) and atomic force microscopy (AFM), while the quality of the chemical vapor deposition (CVD) … how did bucky barnes get his nickname