Dresden 2017 – wissenschaftliches Programm
CPP 32.3: Vortrag
Mittwoch, 22. März 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.