Integrated metasurfaces for advanced solid-state-lighting (Invited Paper)
29 January 2024 • 12:00 PM - 12:30 PM PST | Moscone Center, Room 302 (Level 3 South)
Light-Emitting Diodes (LEDs) exhibit a typical Lambertian emission, usually requiring reshaping by means of secondary optics. We review the potential of various integrated photonic architectures to address the demand for system miniaturization and high efficiency in emerging applications. Photonic structures that can be potentially integrated in LED devices include metalenses, photonic crystals and reflective metasurfaces. We embed periodic nanoantennas in InGaN/GaN multi-quantum well (MQW) LEDs to control their far-field emission directionality and enhance collection efficiency. We propose exploiting mechanisms such as surface lattice resonances, which rely on the near-field coupling between the quantum wells and the nanoantenna array. Multiple experimental and modeling studies demonstrate the benefits and challenges of optimized integrated metasurfaces to enable efficient SSL sources without the need of bulky secondary optics for directional beam control.
Lumileds Germany GmbH (Germany)
Dr. Toni López is a Distinguished Scientist and member of the R&D group at Lumileds. He leads the development and application of modeling methods and toolsets for the design of LED architectures and technologies. For the last 15 years, Dr. López has worked with multi-physics, multi-level device models, and related computational methods to make major contributions to programs for emitter design, epitaxy technology, and device architecture. Before joining Lumileds, Dr. López had worked at Philips Research Laboratories since 2001, where he focused his primary research on the physics of power semiconductor devices in switched-mode power supplies for automotive and computer applications. He received his B.Sc. in electrical engineering with honors, his M.Sc. in electronics and communication engineering, and his Ph.D. with the highest honors at the Polytechnic University of Catalunya, Barcelona, Spain.