Unraveling structural and bonding nature of antimony sesquichalcogenide glass for electronic and photonic applications

Journal of Materials Chemistry C ◽

10.1039/d1tc01433a ◽

2021 ◽

Author(s):

Meng Xu ◽

Rongchuan Gu ◽

Chong Qiao ◽

Hao Tong ◽

Xiaomin Cheng ◽

...

Keyword(s):

Phase Change ◽

Data Storage ◽

Crystalline State ◽

Phase Change Materials ◽

Photonic Devices ◽

Structures And Properties

Sb-based phase-change materials have exhibited tremendous advantages in both data storage and reconfigurable photonic devices. Despite of intensive studies on their structures and properties in the crystalline state, the widely-used...

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Phase Change Metasurfaces by Continuous or Quasi-Continuous Atoms for Active Optoelectronic Integration

Materials ◽

10.3390/ma14051272 ◽

2021 ◽

Vol 14 (5) ◽

pp. 1272

Author(s):

Zhihua Fan ◽

Qinling Deng ◽

Xiaoyu Ma ◽

Shaolin Zhou

Keyword(s):

Phase Change ◽

Phase Change Materials ◽

Complementary Metal Oxide Semiconductor ◽

Photonic Devices ◽

Oxide Semiconductor ◽

Cmos Process ◽

Nanophotonic Devices ◽

Optoelectronic Integration ◽

Hybrid Devices ◽

Micro Electromechanical System

In recent decades, metasurfaces have emerged as an exotic and appealing group of nanophotonic devices for versatile wave regulation with deep subwavelength thickness facilitating compact integration. However, the ability to dynamically control the wave–matter interaction with external stimulus is highly desirable especially in such scenarios as integrated photonics and optoelectronics, since their performance in amplitude and phase control settle down once manufactured. Currently, available routes to construct active photonic devices include micro-electromechanical system (MEMS), semiconductors, liquid crystal, and phase change materials (PCMs)-integrated hybrid devices, etc. For the sake of compact integration and good compatibility with the mainstream complementary metal oxide semiconductor (CMOS) process for nanofabrication and device integration, the PCMs-based scheme stands out as a viable and promising candidate. Therefore, this review focuses on recent progresses on phase change metasurfaces with dynamic wave control (amplitude and phase or wavefront), and especially outlines those with continuous or quasi-continuous atoms in favor of optoelectronic integration.

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Phase Change Materials - From Structures to Kinetics

MRS Proceedings ◽

10.1557/proc-0918-h04-03 ◽

2006 ◽

Vol 918 ◽

Cited By ~ 1

Author(s):

Matthias Wuttig ◽

Wojciech Welnic ◽

Ralf Detemple ◽

Henning Dieker ◽

Johannes Kalb ◽

...

Keyword(s):

Phase Change ◽

Crystalline State ◽

Phase Change Materials ◽

Amorphous State ◽

Structural Difference ◽

Fast Time ◽

Optical Contrast ◽

Fast Time Scale ◽

Kinetics Of ◽

Structure Properties

AbstractPhase change materials possess a unique combination of properties which include a pronounced property contrast between the amorphous and crystalline state, i.e. a high electrical and optical contrast. In particular the latter observation is indicative for a considerable structural difference between the amorphous and crystalline state. At the same time the crystallization of the amorphous state proceeds on a fast time scale. This raises the question how structure, properties and kinetics are related in phase change alloys. It will be demonstrated that only a small group of covalent semiconductors with octahedral-like coordination has the required property combination. This is related to their thermodynamic properties which govern the kinetics of crystallization.

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