Fig. 1. The distributions of doping concentration and barrier width of each quantum wells for the NUQWIP

Fig. 2. The measured high resolution transmission electron microscope（HRTEM）of sample A.

Fig. 3. Energy Spectrometer image of sample A.

Fig. 4. The test results of SIMS for sample A

Fig. 5. The dependence of dark current on bias voltage at different temperatures，the solid line is NUQWIP，and the dotted line is a conventional QWIP

Fig. 6. Photocurrent response spectra of NUQWIP and Conventional QWIP at 50K.

Fig. 7. Relationship between blackbody responsiveness and bias voltage in Non-uniform QWIP and Conventional QWIP at different temperatures.

Fig. 8. Photocurrent response spectra of samples A，B，and C at 50K

Fig. 9. The dependence of dark current on bias voltage of sample A，sample B and sample C at different temperatures.

Fig. 10. Relationship between blackbody responsiveness and bias voltage for samples A，B，and C at different temperatures.