Color Depth Modulation and Resolution in Phase‐Change Material Nanodisplays

Rı́os, Carlos; Hosseini, Peiman; Taylor, Robert A.; Bhaskaran, Harish

doi:10.1002/adma.201506238

Cited by 140 publications

(127 citation statements)

References 31 publications

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“…[6] Exploiting both optical and electrical properties of phase-change materials simultaneously, and the possibility of modulating optical effects using electrical excitations, has only very recently opened up new application fields, such as low-power, nonvolatile, phase-change nano displays. [7][8][9] A deeper understanding of the relationship between the optical and electrical properties of phase-change materials, such as GST, is now urgently required to spur the development of new optoelectronic applications.…”

Section: Doi: 101002/aelm201700079mentioning

confidence: 99%

Mixed‐Mode Electro‐Optical Operation of Ge₂Sb₂Te₅ Nanoscale Crossbar Devices

Rodriguez-Hernandez

Hosseini

Rı́os

et al. 2017

Adv Elect Materials

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The use of phase‐change materials for a range of exciting new optoelectronic applications from artificial retinas to ultrahigh‐resolution displays requires a thorough understanding of how these materials perform under a combination of optical and electrical stimuli. This study reports for the first time the complex link between the electronic and optical properties in real‐world crossbar nanoscale devices constructed by confining a thin layer of Ge2Sb2Te5 between transparent indium tin oxide electrodes, forming an optical nanocavity. A novel proof‐of‐concept device that can be operated by a combination of optical and electrical stimuli is presented, leading the way for the development of further applications based on mixed‐mode electro‐optical operation.

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Section: Doi: 101002/aelm201700079mentioning

confidence: 99%

Mixed‐Mode Electro‐Optical Operation of Ge₂Sb₂Te₅ Nanoscale Crossbar Devices

Rodriguez-Hernandez

Hosseini

Rı́os

et al. 2017

Adv Elect Materials

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“…Only two colours can be tuned via the full crystallization of the few-nanometres-thick GST layer without the contribution provided by changing the thickness of indium tin oxide (ITO) beneath the GST. Previous studies tend to use single phase change material (PCM) as a highly absorbing dielectric layer to realize colour depth modulation, for example, Ag 3 In 4 Sb 76 Te 17 (AIST)9 and two ultrathin GST films10. However, the method based on two ultrathin GST films needs a barrier layer to avoid interdiffusion, which will adversely interfere with the amorphization during actual device operation10 and is unstable because it need accurate thickness control.…”

mentioning

confidence: 99%

Non-binary Colour Modulation for Display Device Based on Phase Change Materials

Tong

Qian

et al. 2016

Sci Rep

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A reflective-type display device based on phase change materials is attractive because of its ultrafast response time and high resolution compared with a conventional display device. This paper proposes and demonstrates a unique display device in which multicolour changing can be achieved on a single device by the selective crystallization of double layer phase change materials. The optical contrast is optimized by the availability of a variety of film thicknesses of two phase change layers. The device exhibits a low sensitivity to the angle of incidence, which is important for display and colour consistency. The non-binary colour rendering on a single device is demonstrated for the first time using optical excitation. The device shows the potential for ultrafast display applications.

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“…Furthermore, PCMs can also be used to produce nanodisplays . It is first reported that an optoelectronic framework based on PCMs is capable of displaying on both rigid and flexible films .…”

Section: Tuning Via Phase Transitionsmentioning

confidence: 99%

“…A conducting atomic force microscope (CAFM) is used to construct the image, where the contrast comes from the different states of each pixel, as shown in Figure f. It is later reported by the same group that instead of GST, another phase‐change alloy Ag 3 In 4 Sb 76 Te 17 (AIST) can be used to make a colorful rendering with improved depth modulation capability …”

Section: Tuning Via Phase Transitionsmentioning

confidence: 99%

Tunable Metasurfaces Based on Active Materials

Cui

Bai

Sun

2019

Adv Funct Materials

204

111

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Metasurfaces, planer artificial materials composed of subwavelength unit cells, have shown superior abilities to manipulate the wavefronts of electromagnetic waves. In the last few years, metasurfaces have been a burgeoning field of research, with a large variety of functional devices, including planar lenses, beam deflectors, polarization converters, and metaholograms, being demonstrated. Up to date, the majority of metasurfaces cannot be tuned postfabrication. Yet, the dynamic control of optical properties of metasurfaces is highly desirable for a plethora of applications including free space optical communications, holographic displays, and depth sensing. Recently, much effort has been made to exploit active materials, whose optical properties can be controlled under external stimuli, for the dynamic control of metasurfaces. The tunability enabled by active materials can be attributed to various mechanisms, including but not limited to thermo‐optic effects, free‐carrier effects, and phase transitions. This short review summarizes the recent progress on tunable metasurfaces based on various approaches and analyzes their respective advantages and challenges to be confronted with. A number of potential future directions are also discussed at the end.

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Color Depth Modulation and Resolution in Phase‐Change Material Nanodisplays

Cited by 140 publications

References 31 publications

Mixed‐Mode Electro‐Optical Operation of Ge₂Sb₂Te₅ Nanoscale Crossbar Devices

Mixed‐Mode Electro‐Optical Operation of Ge₂Sb₂Te₅ Nanoscale Crossbar Devices

Non-binary Colour Modulation for Display Device Based on Phase Change Materials

Tunable Metasurfaces Based on Active Materials

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Color Depth Modulation and Resolution in Phase‐Change Material Nanodisplays

Cited by 140 publications

References 31 publications

Mixed‐Mode Electro‐Optical Operation of Ge2Sb2Te5 Nanoscale Crossbar Devices

Mixed‐Mode Electro‐Optical Operation of Ge2Sb2Te5 Nanoscale Crossbar Devices

Non-binary Colour Modulation for Display Device Based on Phase Change Materials

Tunable Metasurfaces Based on Active Materials

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Mixed‐Mode Electro‐Optical Operation of Ge₂Sb₂Te₅ Nanoscale Crossbar Devices

Mixed‐Mode Electro‐Optical Operation of Ge₂Sb₂Te₅ Nanoscale Crossbar Devices