Summary: Prof. Cheng and his team have made milestone contributions in a series of works describing photonics packaging technology from the art and science points of view. The lecture will present the photonics packaging technology including the high-coupling packaging design of double-variable-curvature microlens employing fully automated process for higher average coupling efficiency from 980-nm lasers into single mode fibers, reduction of fiber alignment and postweld shift in laser module packaging, packaging of passively mode-locked fiber lasers employing carbon nanotubes or graphene, packaging of high-reliability glass-doped phosphor-converted high-power white-light-emitting diodes, and packaging of 300-nm ultra-broadband Cr-doped fiber amplifier for broadband transmission. Bio: Wood-Hi Cheng is a Chair Professor at National Sun Yat-sen University, Kaoshiung, Taiwan, where he founded and became the Director of the Institute of Electro-Optical Engineering (1994–2000), and Dean of College Engineering (2002–2005). In 2007 he chaired the Southern Taiwan Opto-Electronics Center of Excellence. Presently he is a Program Director of Optoelectronics in the National Science Council of Taiwan providing research grants and direction. Prof. Cheng is a Fellow of IEEE and OSA. While Dr. Cheng was in the United States, he contributed to the development and growth of high-speed semiconductor lasers with semi-insulating (SI) blocking layers at Rockwell International, CA. In 1987-1993, he was the first to propose and demonstrate low-threshold, high-power, and high-speed 1.3 mm buried crescent lasers with the iron and cobalt-doped SI current blocking layers. He also developed a high-power low-divergence superradiant diode at General Optronics, NJ. In Taiwan, Professor Cheng’s R&D made contributions to photonic package technology and technology transfer to industry (Quarton). Quarton then became the first solid-state laser company in Taiwan, and is currently the top-five sale for laser pointer in world since 1993. He was recipient of the IEEE Photonics Engineering Achievement Award in 2010 for design, development and commercialization compact solid-state laser modules. Prof. Cheng’s most significant R&D is the demonstration of record ultra-broadband 300-nm Cr-doped fibers (CDFs). The CDFs have been used for the first time as a broadband Cr-doped fiber amplifier (CDFA). With the help of optical-fiber system examination for the CDFA, a 40-Gb/s error-floor free data transmission is successfully demonstrated on fiber-optic transmission.
Abstract Solid-state lighting and solar photovoltaic devices typically employ optical materials comprising isotropic assemblies of atomic and molecular electric dipoles. Many nanomaterials, however, exhibit optical properties that are inconsistent with these simple models. In this talk we discuss novel optical phenomena arising from oriented “multipole antenna” resonances in organic materials and dielectric nanostructures. We identify multipolar resonances in semiconductor nanowires and show how to exploit these effects to enhance light absorption in ultrathin photovoltaics or to construct materials with optical properties not found in nature. These engineered nanomaterials also serve as models for understanding the optical properties of organic materials. We demonstrate antenna effects arising from oriented intra- and inter-molecular exciton species and describe ongoing efforts to measure and manipulate “forbidden” optical processes in heavy-atom phosphors and molecular H-aggregates. Bio Jon Schuller graduated from the Physics department at UC Santa Barbara in 2003. Afterwards, he joined the Applied Physics department at Stanford University where he received his Ph.D. working with Professor Mark Brongersma. There, Schuller's research interests comprised nanophotonics, plasmonics, metamaterials, and IR spectroscopy. After graduating in 2009, he took a position as a Fellow of the Energy Frontier Research Center, where he applied nanophotonics concepts and techniques towards the fundamental study of solar cell materials and optics. In 2012 Schuller became a "born-again Gaucho," joining the ECE department as an Assistant Professor. |
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