Radiant energy – Invisible radiant energy responsive electric signalling – Infrared responsive
Reexamination Certificate
2007-12-25
2011-11-15
Porta, David (Department: 2884)
Radiant energy
Invisible radiant energy responsive electric signalling
Infrared responsive
C250S341800, C250S332000, C385S129000
Reexamination Certificate
active
08058618
ABSTRACT:
Taught is a high sensitivity THz detector and camera comprising an integration body of a photonic crystal THz micro-cavity and semiconductor transistor on a semiconductor base. The THz signal is localized inside of the photonic crystal micro-cavity so as to generate high intensity field in the micro-cavity. The heat effect of the THz wave therein produces electron-hole pairs in the semiconductor. The current carrier is injected into the base electrode of the transistor and is amplified therein to produce signal current in the external circuit and thus high sensitive THz signal detection is realized. Integrating many such detectors together to construct a THz resonant cavity array, each resonant cavity only receives THz light from a certain position and having certain intensity. The signal is converted and then stored to obtain a complete THz image so as to realize imaging in real-time. Special signal amplification circuit is used to eliminate THz background radiation noise.
REFERENCES:
patent: 2004/0075464 (2004-04-01), Samuelson et al.
patent: 2004/0175087 (2004-09-01), Soljacic et al.
Eley Jessica L
Matthias Scholl P.C.
Porta David
Scholl Matthias
Shenzhen University
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