Base on this structure, the photoresponse of each spectral shape is tunable by the period of gratings.

我们可以利用各种不同周期光栅结构来调变响应。

Due to dopant migration, build-in electric field exists in the device.There is open-circuit photoresponse, the detector can operate in photovoltaic mode.

件受掺杂迁移迁移影响而存在内建电场，使得件有开路响应，存在光致电压模式。