Ellipsometry and optical spectroscopy of low-dimensional family TMDs
Here, we report a comprehensive study of the fundamental optical properties of two-dimensional materials. These properties have been ascertained using spectroscopic ellipsometry, optical spectroscopy of Raman scattering, and photoluminescence. We have focused on the optical properties of the chemica...
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| Опубліковано в: : | Semiconductor Physics Quantum Electronics & Optoelectronics |
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| Дата: | 2017 |
| Автори: | , , , |
| Формат: | Стаття |
| Мова: | Англійська |
| Опубліковано: |
Інститут фізики напівпровідників імені В.Є. Лашкарьова НАН України
2017
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| Онлайн доступ: | https://nasplib.isofts.kiev.ua/handle/123456789/214956 |
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| Назва журналу: | Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| Цитувати: | Ellipsometry and optical spectroscopy of low-dimensional family TMDs / V.G. Kravets, V.V. Prorok, L.V. Poperenko, I.A. Shaykevich // Semiconductor Physics Quantum Electronics & Optoelectronics. — 2017. — Т. 20, № 3. — С. 284-296. — Бібліогр.: 43 назв. — англ. |
Репозитарії
Digital Library of Periodicals of National Academy of Sciences of Ukraine| _version_ | 1862726771423576064 |
|---|---|
| author | Kravets, V.G. Prorok, V.V. Poperenko, L.V. Shaykevich, I.A. |
| author_facet | Kravets, V.G. Prorok, V.V. Poperenko, L.V. Shaykevich, I.A. |
| citation_txt | Ellipsometry and optical spectroscopy of low-dimensional family TMDs / V.G. Kravets, V.V. Prorok, L.V. Poperenko, I.A. Shaykevich // Semiconductor Physics Quantum Electronics & Optoelectronics. — 2017. — Т. 20, № 3. — С. 284-296. — Бібліогр.: 43 назв. — англ. |
| collection | DSpace DC |
| container_title | Semiconductor Physics Quantum Electronics & Optoelectronics |
| description | Here, we report a comprehensive study of the fundamental optical properties of two-dimensional materials. These properties have been ascertained using spectroscopic ellipsometry, optical spectroscopy of Raman scattering, and photoluminescence. We have focused on the optical properties of the chemically exfoliated layered TMDs: MoS₂, MoSe₂, WS₂, and WSe₂. The complex refractive index and optical conductivity within the region 1 to 4.5 eV were extracted, which led to the identification of many unique interband transitions at high symmetry points in the electron band structure. The positions of the so-called A and B excitons in monolayers are found to shift upwards in energy as compared with those of the bulk form and have a smaller separation because of the decreased interactions between the layers. For monolayer TMDs, the valence-band spin-orbit splitting at the K point was estimated from the energy difference between the A and B exciton peaks. Our findings of the spin-orbit coupling of ∼0.16, ∼0.26, ∼0.37, and ∼0.55 eV in monolayers MoS₂, MoSe₂, WS₂, and WSe₂, respectively. All these findings not only extend our understanding of the novel electronic structures of mono- and few-layer TMDs but also provide a foundation for future technological applications of optoelectronic and spintronic device components.
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| first_indexed | 2026-03-21T09:46:20Z |
| format | Article |
| fulltext | |
| id | nasplib_isofts_kiev_ua-123456789-214956 |
| institution | Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| issn | 1560-8034 |
| language | English |
| last_indexed | 2026-03-21T09:46:20Z |
| publishDate | 2017 |
| publisher | Інститут фізики напівпровідників імені В.Є. Лашкарьова НАН України |
| record_format | dspace |
| spelling | Kravets, V.G. Prorok, V.V. Poperenko, L.V. Shaykevich, I.A. 2026-03-05T12:05:44Z 2017 Ellipsometry and optical spectroscopy of low-dimensional family TMDs / V.G. Kravets, V.V. Prorok, L.V. Poperenko, I.A. Shaykevich // Semiconductor Physics Quantum Electronics & Optoelectronics. — 2017. — Т. 20, № 3. — С. 284-296. — Бібліогр.: 43 назв. — англ. 1560-8034 PACS: 78.20.-e, 78.66.-w https://nasplib.isofts.kiev.ua/handle/123456789/214956 https://doi.org/10.15407/spqeo20.03.284 Here, we report a comprehensive study of the fundamental optical properties of two-dimensional materials. These properties have been ascertained using spectroscopic ellipsometry, optical spectroscopy of Raman scattering, and photoluminescence. We have focused on the optical properties of the chemically exfoliated layered TMDs: MoS₂, MoSe₂, WS₂, and WSe₂. The complex refractive index and optical conductivity within the region 1 to 4.5 eV were extracted, which led to the identification of many unique interband transitions at high symmetry points in the electron band structure. The positions of the so-called A and B excitons in monolayers are found to shift upwards in energy as compared with those of the bulk form and have a smaller separation because of the decreased interactions between the layers. For monolayer TMDs, the valence-band spin-orbit splitting at the K point was estimated from the energy difference between the A and B exciton peaks. Our findings of the spin-orbit coupling of ∼0.16, ∼0.26, ∼0.37, and ∼0.55 eV in monolayers MoS₂, MoSe₂, WS₂, and WSe₂, respectively. All these findings not only extend our understanding of the novel electronic structures of mono- and few-layer TMDs but also provide a foundation for future technological applications of optoelectronic and spintronic device components. en Інститут фізики напівпровідників імені В.Є. Лашкарьова НАН України Semiconductor Physics Quantum Electronics & Optoelectronics Ellipsometry and optical spectroscopy of low-dimensional family TMDs Article published earlier |
| spellingShingle | Ellipsometry and optical spectroscopy of low-dimensional family TMDs Kravets, V.G. Prorok, V.V. Poperenko, L.V. Shaykevich, I.A. |
| title | Ellipsometry and optical spectroscopy of low-dimensional family TMDs |
| title_full | Ellipsometry and optical spectroscopy of low-dimensional family TMDs |
| title_fullStr | Ellipsometry and optical spectroscopy of low-dimensional family TMDs |
| title_full_unstemmed | Ellipsometry and optical spectroscopy of low-dimensional family TMDs |
| title_short | Ellipsometry and optical spectroscopy of low-dimensional family TMDs |
| title_sort | ellipsometry and optical spectroscopy of low-dimensional family tmds |
| url | https://nasplib.isofts.kiev.ua/handle/123456789/214956 |
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