Temperature-Dependent Optical Properties of Graphene on Si and SiO2/Si Substrates Article Swipe
Si-Si Wu
,
Lingyu Wan
,
Liangmin Wei
,
Devki N. Talwar
,
Kaiyan He
,
Zhe Chuan Feng
·
YOU?
·
· 2021
· Open Access
·
· DOI: https://doi.org/10.3390/cryst11040358
YOU?
·
· 2021
· Open Access
·
· DOI: https://doi.org/10.3390/cryst11040358
Systematic investigations are performed to understand the temperature-dependent optical properties of graphene on Si and SiO2/Si substrates by using a variable angle spectroscopic ellipsometry. The optical constants of graphene have revealed changes with the substrate and temperature. While the optical refractive index (n) of monolayer graphene on Si exhibited clear anomalous dispersions in the visible and near-infrared region (400–1200 nm), the modification is moderate for graphene on SiO2/Si substrate. Two graphene sheets have shown a pronounced absorption in the ultraviolet region with peak position related to the Van Hove singularity in the density of states. By increasing the temperature from 300 K to 500 K, for monolayer graphene on Si, the n value is gradually increased while k decreased. However, the optical constants [n, k] of monolayer graphene on SiO2/Si exhibited unpredictable wave variations. In the wavelength range of 400–1200 nm, an experiential formula of a like-Sellmeier equation is found well suited for describing the dispersions of graphene on Si and SiO2/Si substrates.
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- Type
- article
- Language
- en
- Landing Page
- https://doi.org/10.3390/cryst11040358
- https://www.mdpi.com/2073-4352/11/4/358/pdf?version=1617937985
- OA Status
- gold
- Cited By
- 7
- References
- 45
- Related Works
- 10
- OpenAlex ID
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Raw OpenAlex JSON
- OpenAlex ID
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https://openalex.org/W3149511745Canonical identifier for this work in OpenAlex
- DOI
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https://doi.org/10.3390/cryst11040358Digital Object Identifier
- Title
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Temperature-Dependent Optical Properties of Graphene on Si and SiO2/Si SubstratesWork title
- Type
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articleOpenAlex work type
- Language
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enPrimary language
- Publication year
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2021Year of publication
- Publication date
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2021-03-29Full publication date if available
- Authors
-
Si-Si Wu, Lingyu Wan, Liangmin Wei, Devki N. Talwar, Kaiyan He, Zhe Chuan FengList of authors in order
- Landing page
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https://doi.org/10.3390/cryst11040358Publisher landing page
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https://www.mdpi.com/2073-4352/11/4/358/pdf?version=1617937985Direct link to full text PDF
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goldOpen access status per OpenAlex
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https://www.mdpi.com/2073-4352/11/4/358/pdf?version=1617937985Direct OA link when available
- Concepts
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Graphene, Materials science, Refractive index, Monolayer, Substrate (aquarium), Ellipsometry, Infrared, Silicon, Optoelectronics, Nanotechnology, Thin film, Optics, Physics, Oceanography, GeologyTop concepts (fields/topics) attached by OpenAlex
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7Total citation count in OpenAlex
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2025: 1, 2023: 3, 2022: 3Per-year citation counts (last 5 years)
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45Number of works referenced by this work
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10Other works algorithmically related by OpenAlex
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