Polymer photodetector having resonant wavelength control function

摘要

A polymer photodetector includes a resonant wavelength controller which resonates an optical beam with a particular wavelength only from the incident optical beam received thereinto through the rear surface of the reflection layer, so as to selectively detect the optical beam with the particular wavelength. The resonant wavelength controller includes a fixed mirror layer, a movable mirror layer, and an air layer disposed therebetween. The resonant wavelength can be adjusted by varying an optical length between the movable mirror layer and the fixed mirror layer. The optical length can be adjusted by varying the thickness of the air layer between the movable mirror layer and the fixed mirror layer by way of adjusting the electrostatic force.