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We have developed a micro spectrometer with 64 pixel GaAs base n-i-dot-in-well-i-n photo detector linear array. The physical model has established by its current-voltage, capacitance-voltage and Capacitance to frequency relationship. The model could be easily integrated with the readout circuit for special readout design optimization to realize the wide wavelength range under different radiation (especially...
A novel quantum effect photodetector array consisted of AlAs/GaAs/InGaAs/GaAs/InAs/ quantum-dots in quantum-well hybrid structure has been tested. It showed a wide response wavelength range from 400nm to 1000nm. The low threshold voltage (−0.8V) and the high responsibility (10A/W) at 77K made it a good choice for optical detection. A custom-made capacitor feedback transimpendance amplifier (CTIA)...
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