Utilizing strong light-matter coupling for infrared organic photodiodes with high responsivity and a flat spectral response

Current approaches to the development of narrowband organic photodiodes (OPDs) in the infrared are hindered by material limitations and practical implementation challenges. Polariton microcavities have attracted significant attention for their ability to enhance light–matter interactions, enabling ground-breaking advancements in organic optoelectronic devices. In this work, I will present how we utilized planar polariton microcavities to develop narrowband organic photodiode that delivers combined enhancements in photonic and optoelectronic performance. Specifically, our device achieves narrowband detection with a full-width at half-maximum (FWHM) of less than 30 nm and record-responsivity values up to 0.24 A/W at 965 nm at -2 V [1]. Furthermore, the device exhibits minimal dispersion over a broad angular acceptance cone of ±45°, underscoring its angle-independent operation—a feature critical for practical deployment. This device surpasses existing state-of-the-art spectral narrowing technologies and introduces a paradigm device testbed where polaritonics drive holistic performance improvements. [1] Abdelmagid et. al., https://arxiv.org/pdf/2412.06741 (2024)