Plasmonically Enhanced Colloidal Quantum Dot/Graphene Doped Polymer Random Lasers
An improvement in random lasers based on a colloidal quantum dot (QD)/graphene-doped polymer was observed and attributed to multiple light-scattering and graphene surface plasmon resonance. The emission characteristics of quantum dots doped with graphene oxide and reduced graphene oxide were compare...
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| Format: | Article |
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MDPI AG
2022-03-01
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| Series: | Materials |
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| Online Access: | https://www.mdpi.com/1996-1944/15/6/2213 |
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| author | Mingxuan Cao Min Wang Zhiwen Wang Luhao Zang Hao Liu Shuping Xiao Matthew M. F. Yuen Ying Wang Yating Zhang Jianquan Yao |
| author_facet | Mingxuan Cao Min Wang Zhiwen Wang Luhao Zang Hao Liu Shuping Xiao Matthew M. F. Yuen Ying Wang Yating Zhang Jianquan Yao |
| author_sort | Mingxuan Cao |
| collection | DOAJ |
| description | An improvement in random lasers based on a colloidal quantum dot (QD)/graphene-doped polymer was observed and attributed to multiple light-scattering and graphene surface plasmon resonance. The emission characteristics of quantum dots doped with graphene oxide and reduced graphene oxide were compared. The QD/reduced graphene oxide hybrid exhibited a lower laser emission threshold (~460 μJ/cm<sup>2</sup>). The emission modes and thresholds were strongly dependent on both the graphene doping concentration and the external temperature. Decreased plasmon coupling was the primary reason for lower QD/graphene laser emission with increasing temperature. The optimum reduced graphene oxide concentration was 0.2 wt.%. This work provides a practical approach to optimizing the threshold and stability of random laser devices, with potential applications in displays, sensors, and anti-counterfeiting labels. |
| first_indexed | 2024-03-09T13:27:51Z |
| format | Article |
| id | doaj.art-05936ca91d5949ccbe4c85aba9c9a813 |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-09T13:27:51Z |
| publishDate | 2022-03-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Materials |
| spelling | doaj.art-05936ca91d5949ccbe4c85aba9c9a8132023-11-30T21:21:17ZengMDPI AGMaterials1996-19442022-03-01156221310.3390/ma15062213Plasmonically Enhanced Colloidal Quantum Dot/Graphene Doped Polymer Random LasersMingxuan Cao0Min Wang1Zhiwen Wang2Luhao Zang3Hao Liu4Shuping Xiao5Matthew M. F. Yuen6Ying Wang7Yating Zhang8Jianquan Yao9Department of Intelligent Manufacturing, Wuyi University, Jiangmen 529020, ChinaDepartment of Intelligent Manufacturing, Wuyi University, Jiangmen 529020, ChinaDepartment of Intelligent Manufacturing, Wuyi University, Jiangmen 529020, ChinaDepartment of Intelligent Manufacturing, Wuyi University, Jiangmen 529020, ChinaKey & Core Technology Innovation Institute of The Greater Bay Area, Guangzhou 510535, ChinaDepartment of Intelligent Manufacturing, Wuyi University, Jiangmen 529020, ChinaDepartment of Mechanical Engineering, Hong Kong University of Science and Technology, Hong Kong 999077, ChinaDepartment of Intelligent Manufacturing, Wuyi University, Jiangmen 529020, ChinaInstitute of Laser and Opto-Electronics, College of Precision Instruments and Opto-Electronics Engineering, Tianjin University, Tianjin 300072, ChinaInstitute of Laser and Opto-Electronics, College of Precision Instruments and Opto-Electronics Engineering, Tianjin University, Tianjin 300072, ChinaAn improvement in random lasers based on a colloidal quantum dot (QD)/graphene-doped polymer was observed and attributed to multiple light-scattering and graphene surface plasmon resonance. The emission characteristics of quantum dots doped with graphene oxide and reduced graphene oxide were compared. The QD/reduced graphene oxide hybrid exhibited a lower laser emission threshold (~460 μJ/cm<sup>2</sup>). The emission modes and thresholds were strongly dependent on both the graphene doping concentration and the external temperature. Decreased plasmon coupling was the primary reason for lower QD/graphene laser emission with increasing temperature. The optimum reduced graphene oxide concentration was 0.2 wt.%. This work provides a practical approach to optimizing the threshold and stability of random laser devices, with potential applications in displays, sensors, and anti-counterfeiting labels.https://www.mdpi.com/1996-1944/15/6/2213colloidal quantum dotrandom lasergraphenesurface plasmon resonance |
| spellingShingle | Mingxuan Cao Min Wang Zhiwen Wang Luhao Zang Hao Liu Shuping Xiao Matthew M. F. Yuen Ying Wang Yating Zhang Jianquan Yao Plasmonically Enhanced Colloidal Quantum Dot/Graphene Doped Polymer Random Lasers Materials colloidal quantum dot random laser graphene surface plasmon resonance |
| title | Plasmonically Enhanced Colloidal Quantum Dot/Graphene Doped Polymer Random Lasers |
| title_full | Plasmonically Enhanced Colloidal Quantum Dot/Graphene Doped Polymer Random Lasers |
| title_fullStr | Plasmonically Enhanced Colloidal Quantum Dot/Graphene Doped Polymer Random Lasers |
| title_full_unstemmed | Plasmonically Enhanced Colloidal Quantum Dot/Graphene Doped Polymer Random Lasers |
| title_short | Plasmonically Enhanced Colloidal Quantum Dot/Graphene Doped Polymer Random Lasers |
| title_sort | plasmonically enhanced colloidal quantum dot graphene doped polymer random lasers |
| topic | colloidal quantum dot random laser graphene surface plasmon resonance |
| url | https://www.mdpi.com/1996-1944/15/6/2213 |
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