Self-Hybridized Exciton-Polaritons in Sub-10-nm-Thick WS 2 Flakes: Roles of Optical Phase Shifts at WS 2 /Au Interfaces.
Saved in:
| Title: | Self-Hybridized Exciton-Polaritons in Sub-10-nm-Thick WS 2 Flakes: Roles of Optical Phase Shifts at WS 2 /Au Interfaces. |
|---|---|
| Authors: | Nguyen, Anh Thi1 (AUTHOR) nthianh111@gmail.com, Kwon, Soyeong1 (AUTHOR), Song, Jungeun1 (AUTHOR), Cho, Eunseo1 (AUTHOR), Kim, Hyohyeon1 (AUTHOR), Kim, Dong-Wook1 (AUTHOR) dwkim@ewha.ac.kr |
| Source: | Nanomaterials (2079-4991). Jul2022, Vol. 12 Issue 14, pN.PAG-N.PAG. 10p. |
| Subjects: | Polaritons, Optical multilayers, Numerical calculations, Transition metals, Metalwork, Exciton theory, Phase shift (Nuclear physics) |
| Abstract: | Exciton–polaritons (EPs) can be formed in transition metal dichalcogenide (TMD) multilayers sustaining optical resonance modes without any external cavity. The self-hybridized EP modes are expected to depend on the TMD thickness, which directly determines the resonance wavelength. Exfoliated WS2 flakes were prepared on SiO2/Si substrates and template-stripped ultraflat Au layers, and the thickness dependence of their EP modes was compared. For WS2 flakes on SiO2/Si, the minimum flake thickness to exhibit exciton–photon anticrossing was larger than 40 nm. However, for WS2 flakes on Au, EP mode splitting appeared in flakes thinner than 10 nm. Analytical and numerical calculations were performed to explain the distinct thickness-dependence. The phase shifts of light at the WS2/Au interface, originating from the complex Fresnel coefficients, were as large as π/2 at visible wavelengths. Such exceptionally large phase shifts allowed the optical resonance and resulting EP modes in the sub-10-nm-thick WS2 flakes. This work helps us to propose novel optoelectronic devices based on the intriguing exciton physics of TMDs. [ABSTRACT FROM AUTHOR] |
| Copyright of Nanomaterials (2079-4991) is the property of MDPI and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) | |
| Database: | Engineering Source |
|
Full text is not displayed to guests.
Login for full access.
|
|
| FullText | Links: – Type: pdflink Text: Availability: 1 |
|---|---|
| Header | DbId: egs DbLabel: Engineering Source An: 158299448 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
| IllustrationInfo | |
| Items | – Name: Title Label: Title Group: Ti Data: Self-Hybridized Exciton-Polaritons in Sub-10-nm-Thick WS 2 Flakes: Roles of Optical Phase Shifts at WS 2 /Au Interfaces. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Nguyen%2C+Anh+Thi%22">Nguyen, Anh Thi</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> nthianh111@gmail.com</i><br /><searchLink fieldCode="AR" term="%22Kwon%2C+Soyeong%22">Kwon, Soyeong</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Song%2C+Jungeun%22">Song, Jungeun</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Cho%2C+Eunseo%22">Cho, Eunseo</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Kim%2C+Hyohyeon%22">Kim, Hyohyeon</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Kim%2C+Dong-Wook%22">Kim, Dong-Wook</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> dwkim@ewha.ac.kr</i> – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Nanomaterials+%282079-4991%29%22">Nanomaterials (2079-4991)</searchLink>. Jul2022, Vol. 12 Issue 14, pN.PAG-N.PAG. 10p. – Name: Subject Label: Subjects Group: Su Data: <searchLink fieldCode="DE" term="%22Polaritons%22">Polaritons</searchLink><br /><searchLink fieldCode="DE" term="%22Optical+multilayers%22">Optical multilayers</searchLink><br /><searchLink fieldCode="DE" term="%22Numerical+calculations%22">Numerical calculations</searchLink><br /><searchLink fieldCode="DE" term="%22Transition+metals%22">Transition metals</searchLink><br /><searchLink fieldCode="DE" term="%22Metalwork%22">Metalwork</searchLink><br /><searchLink fieldCode="DE" term="%22Exciton+theory%22">Exciton theory</searchLink><br /><searchLink fieldCode="DE" term="%22Phase+shift+%28Nuclear+physics%29%22">Phase shift (Nuclear physics)</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: Exciton–polaritons (EPs) can be formed in transition metal dichalcogenide (TMD) multilayers sustaining optical resonance modes without any external cavity. The self-hybridized EP modes are expected to depend on the TMD thickness, which directly determines the resonance wavelength. Exfoliated WS2 flakes were prepared on SiO2/Si substrates and template-stripped ultraflat Au layers, and the thickness dependence of their EP modes was compared. For WS2 flakes on SiO2/Si, the minimum flake thickness to exhibit exciton–photon anticrossing was larger than 40 nm. However, for WS2 flakes on Au, EP mode splitting appeared in flakes thinner than 10 nm. Analytical and numerical calculations were performed to explain the distinct thickness-dependence. The phase shifts of light at the WS2/Au interface, originating from the complex Fresnel coefficients, were as large as π/2 at visible wavelengths. Such exceptionally large phase shifts allowed the optical resonance and resulting EP modes in the sub-10-nm-thick WS2 flakes. This work helps us to propose novel optoelectronic devices based on the intriguing exciton physics of TMDs. [ABSTRACT FROM AUTHOR] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of Nanomaterials (2079-4991) is the property of MDPI and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.) |
| PLink | https://search.ebscohost.com/login.aspx?direct=true&site=eds-live&db=egs&AN=158299448 |
| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.3390/nano12142388 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 10 StartPage: N.PAG Subjects: – SubjectFull: Polaritons Type: general – SubjectFull: Optical multilayers Type: general – SubjectFull: Numerical calculations Type: general – SubjectFull: Transition metals Type: general – SubjectFull: Metalwork Type: general – SubjectFull: Exciton theory Type: general – SubjectFull: Phase shift (Nuclear physics) Type: general Titles: – TitleFull: Self-Hybridized Exciton-Polaritons in Sub-10-nm-Thick WS 2 Flakes: Roles of Optical Phase Shifts at WS 2 /Au Interfaces. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Nguyen, Anh Thi – PersonEntity: Name: NameFull: Kwon, Soyeong – PersonEntity: Name: NameFull: Song, Jungeun – PersonEntity: Name: NameFull: Cho, Eunseo – PersonEntity: Name: NameFull: Kim, Hyohyeon – PersonEntity: Name: NameFull: Kim, Dong-Wook IsPartOfRelationships: – BibEntity: Dates: – D: 15 M: 07 Text: Jul2022 Type: published Y: 2022 Identifiers: – Type: issn-print Value: 20794991 Numbering: – Type: volume Value: 12 – Type: issue Value: 14 Titles: – TitleFull: Nanomaterials (2079-4991) Type: main |
| ResultId | 1 |
