Multiband Photodetector Utilizing Unipolar and Bipolar Devices
    14.
    发明申请
    Multiband Photodetector Utilizing Unipolar and Bipolar Devices 有权
    使用单极和双极器件的多频段光电探测器

    公开(公告)号:US20130193308A1

    公开(公告)日:2013-08-01

    申请号:US13724244

    申请日:2012-12-21

    IPC分类号: H01L27/146 H01L27/144

    摘要: Multi-band photodetectors can be formed by series connecting unipolar and, optionally, bipolar semiconductor structures, each having different photodetection bands. Under default mode of operation, the detector with highest resistance and lowest current will be the current limiting device and will be the active photodetector. When the active photodetector is illuminated with strong light in its own detection band it will be optically biased. This active photodetector will no longer be the highest resistance device, and the next photodetector will be the active photodetector. Repeating this operation pattern, allows switching photodetection bands of the multi-band photodetector. The resistances, dark current and photocurrent of the devices should be engineered to have proper switching. Moreover, the illuminating surface, and photodetector placement should be optimized for proper light biasing. The current passing through the device will always be equal to the current of the active photodetector.

    摘要翻译: 多波段光电检测器可以通过串联连接单极和可选地双极半导体结构形成,每个具有不同的光电检测带。 在默认工作模式下,具有最高电阻和最低电流的检测器将是限流装置,并将作为有源光电检测器。 当有源光电探测器在其自身的检测带中用强光照射时,它将被光学偏置。 该有源光电检测器将不再是最高电阻器件,下一个光检测器将是有源光电检测器。 重复该操作模式,允许多频带光电探测器的开关光电检测带。 设备的电阻,暗电流和光电流应设计为具有适当的开关。 此外,应优化照明表面和光电检测器放置以适当的光偏置。 通过器件的电流将始终等于有源光电检测器的电流。