研究目的
Investigating the responsivity and noise in room temperature THz direct detectors made of YBCO thin-film nano-bolometers.
研究成果
YBCO bolometers on bulk substrates are promising for room temperature THz detection due to their large RF bandwidth, fast response, and high sensitivity. Further improvements in TCR and thermal boundary resistance could enhance performance.
研究不足
The study is limited by the thermal boundary resistance variability and the impedance mismatch between the antenna and bolometer, affecting the coupling efficiency and responsivity.
1：Experimental Design and Method Selection:
The study involved the fabrication and characterization of YBCO thin-film nano-bolometers integrated with planar spiral antennas for THz detection.
2：Sample Selection and Data Sources:
YBCO films were deposited using pulsed laser deposition (PLD) technique on sapphire substrates with a buffer layer.
3：List of Experimental Equipment and Materials:
Equipment included a PLD system, electron-beam lithography for device fabrication, and various measurement setups for electrical and optical characterization.
4：Experimental Procedures and Operational Workflow:
The bolometers were characterized at different THz frequencies using coherent multiplier based sources and a far infrared gas laser.
5：Data Analysis Methods:
The responsivity and noise equivalent power were calculated from the measured voltage response and noise spectra.
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