Organic Photovoltaic Device Detects, Measures Polarization of Light (IMAGE)
Caption
This is a close up view of the semitransparent polarization detector. The square area that shows up well is one of the gold electrodes, underneath which is the organic photovoltaic (OPV) material which converts polarized light into an electrical signal. In these images, the background light is linearly polarized. Rotating the detector within this polarized light reduces the transmitted light's brightness as the device is aligned to it. (a) OPV device at 0 degrees; (b) 45 degrees; and (c) 90 degrees. At 90 degrees, the device absorbs the most light, indicating that the background polarization state is oriented parallel to the OPV. This change would be represented as an increase in the detected current.
Credit
Michael Kudenov, NC State University
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