研究目的
Investigating the development and performance of III-nitride-based plasmonic nanolasers emitting from the green to the deep-ultraviolet (UV) region by energetic electron beam injection.
研究成果
The work demonstrates the feasibility of electron-beam-pumped plasmonic nanolasers with emissions from green to deep-UV wavelengths, achieving ultralow thresholds and fast decay times. The observation of spatial and temporal coherence provides evidence for exciton-plasmon coupled polariton lasing, marking a significant advancement towards practical applications in optoelectronics.
研究不足
The study is limited by the intrinsic ohmic loss of metals in the UV region, which affects the propagation length of surface plasmons. Additionally, the quality of Al-rich AlGaN materials and the fabrication process may influence the performance of the nanolasers.
1：Experimental Design and Method Selection:
The study involved the fabrication of III-nitride-based plasmonic nanolasers and their characterization under electron beam injection. The theoretical models included the analysis of surface plasmon polaritons (SPP) and exciton-plasmon coupling.
2：Sample Selection and Data Sources:
Samples were prepared using InGaN/GaN multiple quantum wells (MQWs) for visible light emission and AlGaN/GaN nanorods for UV emission. Data was collected through cathodoluminescence (CL) and time-resolved photoluminescence (TRPL) measurements.
3：List of Experimental Equipment and Materials:
Equipment included a metal–organic chemical vapor deposition (MOCVD) system for sample growth, physical vapor deposition (PVD) for metal film deposition, and inductively coupled plasma (ICP) system for etching. Materials included InGaN/GaN and AlGaN/GaN heterostructures, silver (Ag) and aluminum (Al) films, and SiO2 dielectric gaps.
4：Experimental Procedures and Operational Workflow:
The process involved sample preparation, fabrication of nanorods, deposition of metal films, and optical characterization under electron beam pumping.
5：Data Analysis Methods:
Data analysis included spectral analysis of emission peaks, calculation of mode spacing, and fitting of decay times to exponential models to determine coupling strengths.
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