Abstract
AbstractChalcogenide phase‐change materials, which exhibit a marked difference in their electrical and optical properties when in their amorphous and crystalline phases and can be switched between these phases quickly and repeatedly, are traditionally exploited to deliver nonvolatile data storage in the form of rewritable optical disks and electrical phase‐change memories. However, exciting new potential applications are now emerging in areas such as integrated phase‐change photonics, phase‐change optical metamaterials/metasurfaces, and optoelectronic displays. Here, ideas from these last two fields are fused together to deliver a novel concept, namely a switchable phase‐change metamaterial/metasurface resonant absorber having nonvolatile color generating capabilities. With the phase‐change layer, here GeTe, in the crystalline phase, the resonant absorber can be tuned to selectively absorb the red, green, and blue spectral bands of the visible spectrum, so generating vivid cyan, magenta, and yellow pixels. When the phase‐change layer is switched into the amorphous phase, the resonant absorption is suppressed and a flat, pseudowhite reflectance results. Thus, a route to the potential development is opened‐up of nonvolatile, phase‐change metamaterial color displays and color electronic signage.
Highlights
Santiago García-Cuevas Carrillo, Liam Trimby, Yat-Yin Au, V
As a result of the rather unique properties that phase-change materials possesses, their use has been extended to a number of exciting a route to the potential development is opened-up of nonvolatile, phaseemerging applications including neuchange metamaterial color displays and color electronic signage
The requisite structures for each pixel color were fabricated using magnetron sputtering to deposit the stack of layers on a Si/SiO2 substrate, followed by electron-beam lithography to define the top resonator pattern
Summary
Santiago García-Cuevas Carrillo, Liam Trimby, Yat-Yin Au, V. Exciting new potential applications are emerging phases Ideas from these last two fields are fused together to deliver a novel concept, namely a switchable phase-change metamaterial/metasurface resonant absorber having nonvolatile color generating capabilities. Wright Department of Engineering University of Exeter Exeter EX4 4QF, UK other lithographically patterned metal-dielectric nanostructures[24,28,29] that generate structural (i.e., noncolorant) color using plasmonic effects. There are many exciting application possibilities for phase-change displays, including mobiles, smart labeling, in-window displays, IoT devices, wearables, near-eye displays, and even artificial retinas
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