Paper 13386-8
Paper 13386-8
Strategies for improving light extraction in thin film-based InGaN micro-LED arrays for AR displays (Invited Paper)
27 January 2025 • 2:35 PM - 3:00 PM PST | Moscone West, Room 2016 (Level 2)
Abstract
The LED thin film technology enables light outcoupling via the n-side after removal of the epitaxial growth substrate. Therefore, this technology allows compact integration of micro-LED arrays with single emitters as small as one micrometer and CMOS driving circuits on a silicon wafer, building a promising platform for highresolution AR displays. Despite the potential impact of thin film-based micro-LED arrays on practical AR applications, this technology and the challenges involved are still relatively unexplored. We present fundamental optical properties of thin film-based micro-LED arrays with different pixel sizes down to 1 µm, and we reveal the role of wave optical effects inside micro-LEDs. To address remaining challenges in light outcoupling, we explore different strategies in the micro-LED chip design for improving light extraction efficiency and directionality.
Presenter
Florian Vögl
ams-OSRAM International GmbH (Germany), Technische Univ. Braunschweig (Germany)
Florian Vögl is a doctoral student at ams OSRAM group, Regensburg supervised by Professor Andreas Waag of TU Braunschweig.
He completed his Master’s degree in physics at the Technical University of Munich in 2021 and focused within his Master’s thesis on GaAs based microdiodes with embedded single photon emitters for quantum optics.
He is currently involved in a chip development project at ams OSRAM group, researching new micro-LED technologies for AR applications. This involves the planning and coordination of experiments in a production environment with a particular focus on novel designs.