Low energy switching of phase change materials using a 2D thermal boundary layer Article Swipe
Jing Ning
,
Yunzheng Wang
,
Ting Yu Teo
,
Chung‐Che Huang
,
Ioannis Zeimpekis
,
Katrina Morgan
,
Siew Lang Teo
,
Daniel W. Hewak
,
Michel Bosman
,
Robert E. Simpson
·
YOU?
·
· 2022
· Open Access
·
· DOI: https://doi.org/10.48550/arxiv.2202.04699
YOU?
·
· 2022
· Open Access
·
· DOI: https://doi.org/10.48550/arxiv.2202.04699
The switchable optical and electrical properties of phase change materials (PCMs) are finding new applications beyond data storage in reconfigurable photonic devices. However, high power heat pulses are needed to melt-quench the material from crystalline to amorphous. This is especially true in silicon photonics, where the high thermal conductivity of the waveguide material makes heating the PCM energy inefficient. Here, we improve the energy efficiency of the laser-induced phase transitions by inserting a layer of two-dimensional (2D) material, either MoS2 or WS2, between the silica or silicon and the PCM. The 2D material reduces the required laser power by at least 40% during the amorphization (RESET) process, depending on the substrate. Thermal simulations confirm that both MoS2 and WS2 2D layers act as a thermal barrier, which efficiently confines energy within the PCM layer. Remarkably, the thermal insulation effect of the 2D layer is equivalent to a ~100 nm layer of SiO2. The high thermal boundary resistance induced by the van der Waals (vdW)-bonded layers limits the thermal diffusion through the layer interfaces. Hence, 2D materials with stable vdW interfaces can be used to improve the thermal efficiency of PCM-tuned Si photonic devices. Furthermore, our waveguide simulations show that the 2D layer does not affect the propagating mode in the Si waveguide, thus this simple additional thin film produces a substantial energy efficiency improvement without degrading the optical performance of the waveguide. Our findings pave the way for energy-efficient laser-induced structural phase transitions in PCM-based reconfigurable photonic devices.
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- Type
- preprint
- Language
- en
- Landing Page
- http://arxiv.org/abs/2202.04699
- https://arxiv.org/pdf/2202.04699
- OA Status
- green
- Related Works
- 10
- OpenAlex ID
- https://openalex.org/W4221153980
All OpenAlex metadata
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https://openalex.org/W4221153980Canonical identifier for this work in OpenAlex
- DOI
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https://doi.org/10.48550/arxiv.2202.04699Digital Object Identifier
- Title
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Low energy switching of phase change materials using a 2D thermal boundary layerWork title
- Type
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preprintOpenAlex work type
- Language
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enPrimary language
- Publication year
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2022Year of publication
- Publication date
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2022-02-09Full publication date if available
- Authors
-
Jing Ning, Yunzheng Wang, Ting Yu Teo, Chung‐Che Huang, Ioannis Zeimpekis, Katrina Morgan, Siew Lang Teo, Daniel W. Hewak, Michel Bosman, Robert E. SimpsonList of authors in order
- Landing page
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https://arxiv.org/abs/2202.04699Publisher landing page
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https://arxiv.org/pdf/2202.04699Direct link to full text PDF
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YesWhether a free full text is available
- OA status
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greenOpen access status per OpenAlex
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https://arxiv.org/pdf/2202.04699Direct OA link when available
- Concepts
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Materials science, Optoelectronics, Photonics, Thermal conductivity, Waveguide, Layer (electronics), Laser, Silicon photonics, Thermal, Silicon, Phase-change material, Phase (matter), Optics, Nanotechnology, Composite material, Organic chemistry, Chemistry, Meteorology, PhysicsTop concepts (fields/topics) attached by OpenAlex
- Cited by
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0Total citation count in OpenAlex
- Related works (count)
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10Other works algorithmically related by OpenAlex
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