研究目的
To improve the sensitivity of terahertz (THz) cameras for real-time THz imaging by developing a new micro-bolometer array with a resonant cavity structure and a method for evaluating sensitivity across a wide THz frequency range.
研究成果
The sensitivity of the THz camera was significantly improved by one order of magnitude in the frequency range below 1 THz through the development of a new micro-bolometer array with a resonant cavity structure. This advancement enables real-time THz imaging applications such as molecular imaging and nondestructive inspection.
研究不足
The sensitivity of the THz camera is still inferior to cooled-type THz cameras by one or two orders of magnitude. The polarization dependence of the sensitivities could introduce errors in the evaluation.
1：Experimental Design and Method Selection:
Developed a new micro-bolometer structure with a resonant cavity to enhance THz absorption and a method for evaluating sensitivity across a wide frequency range.
2：Sample Selection and Data Sources:
Used a broadband high-power pulsed THz source with THz bandpass filters to measure the frequency dependence of sensitivity.
3：List of Experimental Equipment and Materials:
Included a THz quantum cascade laser or nonlinear optical crystal as the THz wave emitter, THz bandpass filters, and a THz camera with a micro-bolometer array.
4：Experimental Procedures and Operational Workflow:
Measured the frequency dependence of the sensitivity of the THz camera in the
5：5–0-THz range, considering polarization dependence. Data Analysis Methods:
Analyzed the sensitivity improvement by comparing the performance of the new micro-bolometer array with the original one.
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