Lasers, Optics & Photonics

Biography

Biography: Jae Su Yu

Abstract

Over the past few years, light managements including antireflection, light scattering, and light trapping have been shown to be a promising approach to develop various optoelectronic and photonic devices and to improve their performance for optical sensing and energy harvesting applications. As an alternative of conventional antireflection layers, there has been much research on the nano- or micro-textured surfaces with efficient antireflection and light-scattering properties. Low-dimensional metal oxide nanostructures are very promising for photodetectors and sensors because of their excellent physical and chemical properties. On the other hand, to enhance light harvesting, antireflective structured polymers, for example, polycarbonate, polydimethylsiloxane, polymethyl methacrylate, polyurethane, etc., have been explored. Also, these structures can be employed in light-emitting diodes to enhance the light extraction efficiency. For this reason, an increasing attention has been recently given to functional nano/microstructured materials including nanowires/nanorods, nanophotonics, microtextures and biomimetic materials. For the nano/microstructures, various fabrication methods using growth/synthesis as well as dry/wet etching via nano/micro patterning were developed. Therefore, optical design and analysis of nano/microscale structures are required for potential applications of various devices such as solar cells, photodetectors, light-emitting diodes, and sensors. In this talk, I present the fabrication and optical properties of inorganic and organic nano/microstructures for light harvesting and sensing applications. Also, to enhance the device performance, the geometrical and optical structures were designed and analyzed based on theoretical calculations. By applying these structures to optoelectronic and photonic devices, their characteristics were evaluated.