公开(公告)号：US20030075767A1

公开(公告)日：2003-04-24

申请号：US10045356

申请日：2001-10-23

Applicant: MCNC

Inventor： John M. Lannon JR. ,  David E. Dausch ,  Dorota Temple

IPC: H01L027/14 ,  H01L029/82 ,  H01L029/84

CPC classification number: B82Y25/00 ,  G01J4/00 ,  H01F10/3254 ,  H01F41/325 ,  H01L31/0216 ,  H01L31/02327

Abstract: The present invention provides for an improved polarized-light detector device. The device comprises a photodiode having a first contact disposed on the backside of a light-sensing medium and a second contact disposed on the frontside of the light-sensing medium. A spin filter medium is disposed between the backside of the light-sensing medium and the first contact. The application of a magnetic field aligns the magnetic moments in the spin-filter medium to cause the device to discriminate between different polarizations of an optical signal. The polarization discrimination is affected by introducing a net magnetization into the spin filter medium, thereby allowing selected spin-polarized electrons to either be transmitted through the spin filter medium to the point of detection or deflected from further transmission. Additionally, the invention is embodied in a polarization-selective-light detector array and methods for discriminating a polarized optical signal and selective optical wavelength detection.

Abstract translation: 本发明提供一种改进的偏振光检测器装置。 该装置包括光电二极管，其具有设置在光感测介质的背面上的第一触点和设置在光感测介质的前侧上的第二触点。 旋转过滤介质设置在光感测介质的背面与第一接触件之间。 磁场的应用使自旋滤波器介质中的磁矩对准以使器件鉴别光信号的不同极化。 通过向自旋过滤介质中引入净磁化，从而允许选定的自旋极化电子通过自旋过滤介质传输到检测点或进一步传输偏转，影响极化鉴别。 此外，本发明体现在偏振选择光检测器阵列中以及用于鉴别偏振光信号和选择性光波长检测的方法。