Figure 2 | Spectrum projection using the bandgap-gradient device. (IMAGE)

Light Publishing Center, Changchun Institute of Optics, Fine Mechanics And Physics, CAS

Figure 2 | Spectrum projection using the bandgap-gradient device.

Caption

a) Spectral diagrams of 20 different radiations measured by a spectrometer, and the intensities of the curves are normalized according to the measurements of a light power density meter. b) Scheme of the bandgap-gradient device that is used. c) Calibration of the device. d) Photogenerated currents the device for the 20 incident radiations. e) The average photon energy of the radiations measured by the device compared with those obtained from the spectrometer.

Credit

by Mei-Na Zhang, Xiaohan Wu, Antoine Riaud, Xiao-Lin Wang, Fengxian Xie, Wen-Jun Liu, Yongfeng Mei, David Wei Zhang and Shi-Jin Ding

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