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portada Field-Effect Self-Mixing Terahertz Detectors (Springer Theses)
Type
Physical Book
Publisher
Language
English
Pages
126
Format
Paperback
ISBN13
9783662569481
Edition No.
1

Field-Effect Self-Mixing Terahertz Detectors (Springer Theses)

Jiandong Sun (Author) · Springer · Paperback

Field-Effect Self-Mixing Terahertz Detectors (Springer Theses) - Jiandong Sun

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Synopsis "Field-Effect Self-Mixing Terahertz Detectors (Springer Theses)"

A comprehensive device model considering both spatial distributions of the terahertz field and the field-effect self-mixing factor has been constructed for the first time in the thesis. The author has found that it is the strongly localized terahertz field induced in a small fraction of the gated electron channel that plays an important role in the high responsivity. An AlGaN/GaN-based high-electron-mobility transistor with a 2-micron-sized gate and integrated dipole antennas has been developed and can offer a noise-equivalent power as low as 40 pW/Hz1/2 at 900 GHz. By further reducing the gate length down to 0.2 micron, a noise-equivalent power of 6 pW/Hz1/2 has been achieved. This thesis provides detailed experimental techniques and device simulation for revealing the self-mixing mechanism including a scanning probe technique for evaluating the effectiveness of terahertz antennas. As such, the thesis could be served as a valuable introduction towards further development of high-sensitivity field-effect terahertz detectors for practical applications.

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