Standing wave spectrometer with semi-transparent organic detector

A fast and compact standing wave spectrometer based on semi-transparent organic photodetectors is developed. The semi-transparent organic detectors are realized using solution-based fabrication and exhibit an overall transmittance of about 20% in the visible range of the electromagnetic spectrum. The realization of a standing wave spectrometer is achieved by combining a semi-transparent organic detector with a movable mirror controlled by a piezo micro-actuator. The operating principles of the standing wave spectrometer are demonstrated using a combined illumination from two laser sources. The advantages of standing wave sensing devices based on organic materials as well as the required material properties are presented and discussed.