Plasmonically Enhanced Colloidal Quantum Dot/Graphene Doped Polymer Random Lasers

Mingxuan Cao; Min Wang; Zhiwen Wang; Luhao Zang; Hao Liu; Shuping Xiao; Matthew M. F. Yuen; Ying Wang; Yating Zhang; Jianquan Yao

doi:10.3390/ma15062213

Materials (Mar 2022)

Plasmonically Enhanced Colloidal Quantum Dot/Graphene Doped Polymer Random Lasers

Mingxuan Cao,
Min Wang,
Zhiwen Wang,
Luhao Zang,
Hao Liu,
Shuping Xiao,
Matthew M. F. Yuen,
Ying Wang,
Yating Zhang,
Jianquan Yao

Affiliations

Mingxuan Cao: Department of Intelligent Manufacturing, Wuyi University, Jiangmen 529020, China
Min Wang: Department of Intelligent Manufacturing, Wuyi University, Jiangmen 529020, China
Zhiwen Wang: Department of Intelligent Manufacturing, Wuyi University, Jiangmen 529020, China
Luhao Zang: Department of Intelligent Manufacturing, Wuyi University, Jiangmen 529020, China
Hao Liu: Key & Core Technology Innovation Institute of The Greater Bay Area, Guangzhou 510535, China
Shuping Xiao: Department of Intelligent Manufacturing, Wuyi University, Jiangmen 529020, China
Matthew M. F. Yuen: Department of Mechanical Engineering, Hong Kong University of Science and Technology, Hong Kong 999077, China
Ying Wang: Department of Intelligent Manufacturing, Wuyi University, Jiangmen 529020, China
Yating Zhang: Institute of Laser and Opto-Electronics, College of Precision Instruments and Opto-Electronics Engineering, Tianjin University, Tianjin 300072, China
Jianquan Yao: Institute of Laser and Opto-Electronics, College of Precision Instruments and Opto-Electronics Engineering, Tianjin University, Tianjin 300072, China

DOI: https://doi.org/10.3390/ma15062213
Journal volume & issue: Vol. 15, no. 6
p. 2213

Abstract

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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/cm2). 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.

Published in Materials

ISSN: 1996-1944 (Online)
Publisher: MDPI AG
Country of publisher: Switzerland
LCC subjects: Technology: Electrical engineering. Electronics. Nuclear engineering; Technology: Engineering (General). Civil engineering (General); Science: Natural history (General): Microscopy; Science: Physics: Descriptive and experimental mechanics
Website: http://www.mdpi.com/journal/materials/

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