研究目的
Investigating the fabrication of high power terahertz quantum cascade lasers (THz QCLs) and their application in high-resolution digital holographic imaging.
研究成果
The fabrication of high power THz QCLs at 4.4 THz with a maximum output power of 95mW and a working temperature up to 80 K was demonstrated. The application in a home-built digital holographic imaging system achieved a lateral resolution of 80μm, close to the system's intrinsic limit. This advancement is significant for the application of THz imaging systems.
研究不足
The requirement of cryogenic cooling limits the practical applications of THz QCLs. The maximum working temperature achieved is 80 K.
1：Experimental Design and Method Selection:
The study focuses on the fabrication of THz QCLs using resonant-phonon active region design and semi-insulating surface-plasmon waveguide. The methodology includes molecular beam epitaxy (MBE) growth optimization and semiconductor device fabrication process.
2：Sample Selection and Data Sources:
The samples are THz QCLs fabricated with specific layer sequences for the active region. Data includes HRXRD spectrum, SEM images, and P-I-V curves.
3：List of Experimental Equipment and Materials:
Equipment includes MBE for growth, HRXRD for structural analysis, SEM for imaging, and a home-built digital holographic imaging system for application demonstration.
4：Experimental Procedures and Operational Workflow:
The process involves MBE growth of the active region, device fabrication, characterization of optical and electrical properties, and application in holographic imaging.
5：Data Analysis Methods:
Analysis includes comparison of experimental and theoretical HRXRD spectra, evaluation of P-I-V curves, and assessment of imaging resolution.
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