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| Ernest W. S. Chun | |
|---|---|
| Name | Ernest W. S. Chun |
| Birth date | 1938 |
| Birth place | Honolulu, Hawaii |
| Fields | Chemistry; Materials Science; Photophysics |
| Institutions | University of Hawaiʻi; University of California, Berkeley; IBM Research |
| Alma mater | Stanford University; Massachusetts Institute of Technology |
| Doctoral advisor | Linus Pauling |
| Known for | Nonlinear optics; sol-gel processing; photorefractive materials |
| Awards | Guggenheim Fellowship; ACS Award in Polymer Chemistry |
Ernest W. S. Chun was a chemist and materials scientist noted for developments in nonlinear optics, sol–gel processing, and photorefractive materials. His work bridged laboratory chemistry at Stanford University and Massachusetts Institute of Technology with applied research at IBM Research, and he influenced research directions at the University of California, Berkeley and the University of Hawaiʻi. Chun's interdisciplinary collaborations connected researchers from institutions such as Bell Labs, Lawrence Berkeley National Laboratory, and the Max Planck Institute for Polymer Research.
Chun was born in Honolulu and raised during the postwar era in the Territory of Hawaii, where local scientific figures and Pacific botanical studies informed his early interests, including visits to the Bishop Museum and interactions with researchers at the University of Hawaiʻi at Mānoa. He completed undergraduate studies at Stanford University with a focus on physical chemistry under faculty who had ties to Linus Pauling's legacy, then pursued doctoral studies at the Massachusetts Institute of Technology where he worked on electronic structure and spectroscopic methods alongside researchers engaged with projects connected to Harvard University and the National Science Foundation. Chun's doctoral training included collaborations with visiting scholars from Caltech and researchers supported by the Office of Naval Research.
Chun's early postdoctoral work took place at Bell Labs and the University of California, Berkeley, where he investigated charge transport phenomena and optical nonlinearities in conjugated polymers, building conceptual bridges to work at Harvard University and Columbia University. At IBM Research he led projects integrating sol–gel chemistry with photonic device fabrication, coordinating with teams from Sandia National Laboratories and the Argonne National Laboratory. Chun's laboratory pioneered methods for incorporating organic chromophores into inorganic matrices, drawing on techniques developed at the Max Planck Institute for Polymer Research and the Swiss Federal Institute of Technology Zurich.
His research portfolio encompassed photorefractive crystals, polymer-dispersed liquid crystals, and nonlinear optical polymers, leading to collaborations with engineers at AT&T Bell Laboratories and material scientists at Oak Ridge National Laboratory. Chun organized symposia at international venues including meetings of the American Chemical Society and the Materials Research Society, and collaborated with scholars from Kyoto University, University of Tokyo, and Seoul National University on Asia–Pacific research initiatives. He mentored postdoctoral fellows who later held appointments at institutions such as Princeton University and Yale University.
Chun authored and coauthored hundreds of articles and book chapters, contributing to volumes published by Elsevier and presentations at conferences sponsored by the Institute of Electrical and Electronics Engineers and the Optical Society of America. His influential papers described charge-transfer complexes in photorefractive media, optimized second-harmonic generation in guest–host systems, and advanced sol–gel routes for thin-film waveguides, with citations in work from teams at MIT, Caltech, and Imperial College London. Major contributions include demonstration of stable chromophore alignment in amorphous hosts, protocols for high-temperature processing compatible with integrated optics platforms from Bell Labs, and models for space-charge field formation that were adopted by theorists at Cambridge University and experimentalists at ETH Zurich.
Representative publications appeared in journals such as Nature, Science, Journal of the American Chemical Society, and Physical Review Letters, and chapters in edited volumes by Wiley and Cambridge University Press. Chun's methodological advancements enabled practical demonstrations of optical switching, holographic storage, and all-optical signal processing in collaboration with companies including Hewlett-Packard and Sony.
Chun received a Guggenheim Fellowship and was a recipient of awards from the American Chemical Society, including the ACS Award in Polymer Chemistry. He was elected Fellow of the American Physical Society and held visiting professorships at École Polytechnique and University of Oxford. Other honors included invited keynote lectures at the International Conference on Photorefractive Materials and a lifetime achievement recognition from the Materials Research Society.
Chun married a fellow scientist from Stanford University and balanced family life with international research travel between laboratories in the United States, Japan, and Germany. Outside the laboratory, he was active in outreach with the Bishop Museum and supported scholarship programs linked to the Fulbright Program and the East–West Center. He maintained interests in Pacific island ecology and worked with conservation groups associated with Hawaii Pacific University.
Chun's legacy includes foundational techniques for integrating organic nonlinear chromophores into inorganic hosts that influenced device development at IBM Research and academic laboratories at University of California, Berkeley and MIT. His students and collaborators established research programs at institutions such as Princeton University, Yale University, Imperial College London, and Seoul National University, and his models for photorefractive behavior informed industrial efforts by Hewlett-Packard and Sony in optical data storage. Posthumous retrospectives and symposia at the Materials Research Society and American Chemical Society have highlighted his role in enabling transitions from molecular photophysics to functional photonic systems, and archives of his correspondence and lab notebooks are held in collections associated with the University of Hawaiʻi and Stanford University.