journal article·2022-05

Tunable Plasmonic Random Laser Based on Emitters Coupled to Plasmonic Resonant Nanocavities of Silver Nanorod Arrays

Junxi Zhang, Fei Wang, Sonia Ghafoor, Haoyu Wang, Wei Zhang, Kang Xie, Rui Cheng, Jian Yan, Lijie Niu, Pei Wang, Lin Zhang, Zhijia Hu

Advanced Optical Materials· Volume 10· Issue 10
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Abstract

Abstract Random lasers are generated by multiple light scattering in disordered optically gain medium, which are fundamentally different from conventional lasers. Control of emission properties, especially emission wavelength for random lasers is still challenging due to absence of optical cavity. Although plasmonic random lasers exhibit well‐controlled properties, most of studies on plasmonic random lasers to date are still focused on scattering amplification by disorder metal nanoparticles. Here, a tunable random laser based on emitters of Nile red/poly‐methyl methacrylate (PMMA) coupled to plasmonic resonant nanocavities of silver nanorod arrays is presented. The plasmonic random laser has very strong and narrow emission peaks and a very low lasing threshold of 22.8 µJ, resulting from plasmon resonance energy transfer (PRET), the enhanced absorption, scattering, and excitation rates of Nile red/PMMA due to strong localized electric fields in the nanocavities, and enhanced multiple light scattering from the disorder–order hybrid silver nanorod arrays. Furthermore, the lasing wavelength can be tuned in a wide range from 623 to 654 nm by different order harmonic modes of the plasmonic resonant nanocavities. This work not only provides a new strategy to design tunable random lasers, but also opens up their potential applications in medicine and sensing.
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Research context

OpenAlex topics: Random lasers and scattering media · Orbital Angular Momentum in Optics · Photonic Crystals and Applications

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Department of Opto‐Electronic Information Science and Engineering School of Instrument Science and Opto‐Electronics Engineering Anhui Province Key Laboratory of Measuring Theory and Precision Instrument National Engineering Laboratory of Special Display Technology Hefei University of Technology Hefei 230009 China

Aston Institute of Photonic Technologies School of Engineering & Applied Science Aston University Birmingham B4 7ET UK

Department of Optics and Optical Engineering University of Science and Technology of China Hefei 230026 China

School of Physics Hefei University of Technology Hefei 230009 China

School of Opto‐Electronic Engineering Zaozhuang University Zaozhuang Shandong 277160 China

School of Materials Science and Engineering Anhui Key Laboratory of Advanced Functional Materials and Devices Hefei University of Technology Hefei 230009 China

Information Materials and Intelligent Sensing Laboratory of Anhui Province School of Physics and Materials Science Anhui University Hefei 230601 China

Funding

National Natural Science Foundation of China · Fundamental Research Funds for the Central Universities

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