Dresden 2017 – scientific programme

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DS: Fachverband Dünne Schichten

DS 29: Organic Thin Films I

DS 29.3: Talk

Wednesday, March 22, 2017, 10:00–10:15, CHE 91

Coherent absorption in organic thin-film layered structures — •Tony Henseleit, Tim Wagner, Markas Sudzius, Hartmut Fröb, and Karl Leo — IAPP, Dresden, Deutschland

Development of strongly absorbing materials and devices has been a long-standing research field. Many of these efforts are based on a intriguing concept of perfect coherent absorption, which (assuming, that all required conditions are set up correctly) leads to a perfect conversion of optical energy to some form of an internal energy within the optically active material.

In this study, we focus on coherent absorption in layered thin-film structures with an organic absorbing material. The structures consist of a high optical quality dielectric distributed Bragg reflector and thermally evaporated layer of small organic molecules on it. We demonstrate both experimentally and numerically, that careful control of the resonator design and optical properties of an absorbing layer, allows to reduce amount of reflected light to the minimum and, therefore, to enhance absorption efficiency of thin organic layer up to almost 100 percent.