Copper Functionalized SnSe Nanoflakes Enabling Nonlinear Optical Features for Ultrafast Photonics
Abstract This study enhances the ultrafast photonics application of tin selenide (SnSe) nanoflakes via copper (Cu) functionalization to overcome challenges such as low conductivity and weak near‐infrared (NIR) absorption. Cu functionalization enhances concentration, induces strain, and reduces the b...
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| Format: | Article |
| Language: | English |
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Wiley
2024-10-01
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| Series: | Advanced Science |
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| Online Access: | https://doi.org/10.1002/advs.202401218 |
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| author | Ke Ren Hualei Yuan Zhongben Pan Zongsheng Li Han Pan Hongwei Chu Dechun Li |
| author_facet | Ke Ren Hualei Yuan Zhongben Pan Zongsheng Li Han Pan Hongwei Chu Dechun Li |
| author_sort | Ke Ren |
| collection | DOAJ |
| description | Abstract This study enhances the ultrafast photonics application of tin selenide (SnSe) nanoflakes via copper (Cu) functionalization to overcome challenges such as low conductivity and weak near‐infrared (NIR) absorption. Cu functionalization enhances concentration, induces strain, and reduces the bandgap through Sn substitution and Sn vacancy filling with Cu ions. Demonstrated by density functional theory calculations and experimental analyses, Cu‐functionalized SnSe exhibits improved NIR optical absorption and superior third‐order nonlinear optical properties. Z‐scan measurements and femtosecond transient absorption spectroscopy reveal better performance of Cu‐functionalized SnSe in terms of nonlinear optical properties and shorter carrier relaxation times compared to pristine SnSe. Furthermore, saturable absorbers based on both SnSe types, when integrated into an erbium‐doped fiber laser, show that Cu functionalization leads to a decrease in pulse duration to 798 fs and an increase in 3 dB spectral bandwidth to 3.44 nm. Additionally, it enables stable harmonic mode‐locking of bound‐state solitons. This work suggests a new direction for improving wide bandgap 2D materials by highlighting the enhanced nonlinear optical properties and potential of Cu‐functionalized SnSe in ultrafast photonics. |
| format | Article |
| id | doaj-art-4a413ae4700a40ca93a153b98618cdca |
| institution | OA Journals |
| issn | 2198-3844 |
| language | English |
| publishDate | 2024-10-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advanced Science |
| spelling | doaj-art-4a413ae4700a40ca93a153b98618cdca2025-08-20T02:17:06ZengWileyAdvanced Science2198-38442024-10-011138n/an/a10.1002/advs.202401218Copper Functionalized SnSe Nanoflakes Enabling Nonlinear Optical Features for Ultrafast PhotonicsKe Ren0Hualei Yuan1Zhongben Pan2Zongsheng Li3Han Pan4Hongwei Chu5Dechun Li6School of Information Science and Engineering, and Key Laboratory of Laser and Infrared System of Ministry of EducationShandong UniversityQingdao266237ChinaQingdao Institute of Bioenergy and Bioprocess TechnologyChinese Academy of Sciences Qingdao 266101 ChinaSchool of Information Science and Engineering, and Key Laboratory of Laser and Infrared System of Ministry of EducationShandong UniversityQingdao266237ChinaSchool of Information Science and Engineering, and Key Laboratory of Laser and Infrared System of Ministry of EducationShandong UniversityQingdao266237ChinaSchool of Information Science and Engineering, and Key Laboratory of Laser and Infrared System of Ministry of EducationShandong UniversityQingdao266237ChinaSchool of Information Science and Engineering, and Key Laboratory of Laser and Infrared System of Ministry of EducationShandong UniversityQingdao266237ChinaSchool of Information Science and Engineering, and Key Laboratory of Laser and Infrared System of Ministry of EducationShandong UniversityQingdao266237ChinaAbstract This study enhances the ultrafast photonics application of tin selenide (SnSe) nanoflakes via copper (Cu) functionalization to overcome challenges such as low conductivity and weak near‐infrared (NIR) absorption. Cu functionalization enhances concentration, induces strain, and reduces the bandgap through Sn substitution and Sn vacancy filling with Cu ions. Demonstrated by density functional theory calculations and experimental analyses, Cu‐functionalized SnSe exhibits improved NIR optical absorption and superior third‐order nonlinear optical properties. Z‐scan measurements and femtosecond transient absorption spectroscopy reveal better performance of Cu‐functionalized SnSe in terms of nonlinear optical properties and shorter carrier relaxation times compared to pristine SnSe. Furthermore, saturable absorbers based on both SnSe types, when integrated into an erbium‐doped fiber laser, show that Cu functionalization leads to a decrease in pulse duration to 798 fs and an increase in 3 dB spectral bandwidth to 3.44 nm. Additionally, it enables stable harmonic mode‐locking of bound‐state solitons. This work suggests a new direction for improving wide bandgap 2D materials by highlighting the enhanced nonlinear optical properties and potential of Cu‐functionalized SnSe in ultrafast photonics.https://doi.org/10.1002/advs.202401218copper functionalized tin selenidehigh‐harmonic generationmode‐locked fiber lasersnonlinear optical propertynonlinear pulse dynamicssaturable absorber |
| spellingShingle | Ke Ren Hualei Yuan Zhongben Pan Zongsheng Li Han Pan Hongwei Chu Dechun Li Copper Functionalized SnSe Nanoflakes Enabling Nonlinear Optical Features for Ultrafast Photonics Advanced Science copper functionalized tin selenide high‐harmonic generation mode‐locked fiber lasers nonlinear optical property nonlinear pulse dynamics saturable absorber |
| title | Copper Functionalized SnSe Nanoflakes Enabling Nonlinear Optical Features for Ultrafast Photonics |
| title_full | Copper Functionalized SnSe Nanoflakes Enabling Nonlinear Optical Features for Ultrafast Photonics |
| title_fullStr | Copper Functionalized SnSe Nanoflakes Enabling Nonlinear Optical Features for Ultrafast Photonics |
| title_full_unstemmed | Copper Functionalized SnSe Nanoflakes Enabling Nonlinear Optical Features for Ultrafast Photonics |
| title_short | Copper Functionalized SnSe Nanoflakes Enabling Nonlinear Optical Features for Ultrafast Photonics |
| title_sort | copper functionalized snse nanoflakes enabling nonlinear optical features for ultrafast photonics |
| topic | copper functionalized tin selenide high‐harmonic generation mode‐locked fiber lasers nonlinear optical property nonlinear pulse dynamics saturable absorber |
| url | https://doi.org/10.1002/advs.202401218 |
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