Plasmonic Color

Hosted By: Optical Material Studies Technical Group

25 October 2018, 8:30 - 9:30

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This webinar hosted by the OSA Optical Material Studies Technical Group aims to provide an introduction of structural coloring by plasmonic and dielectric structure and discuss its future direction. Structural color is one of the representative achievements of nanometer-scale architectures to manipulate the flow of light. An astonishing variety of natural photonic structure, such as Morpho rhetenor, has inspired the field of nanophotonics, especially the structural color printing. This method of generating colors, not by pigment-based color, has been providing great inspiration for nanophotonic research and technological applications.

Among the various ways to create structural color metasurfaces, 2D counterpart of metamaterials have drawn lots of research interest due to its capability of surpassing diffraction limit and achieving nano-size resolution. Plasmonic metasurfaces designed based on surface plasmon resonance (SPR) have been studied with a variety of nano-scale geometry like hole, metal-insulator-metal, rod, grating and etc. Furthermore, dielectric-based metasurfaces supported by Mie resonance has been suggested as an approach to circumvent lossy problem in plasmonic structure. In the last few years, people have focused on enhancing color performance, tunable/dynamic coloring and large-scale fabrication method toward practical applications.

This hour-long webinar presented by Dr. Robert Simpson and Dr. Joel Yang from the Singapore University of Technology and Design will cover:

  • Basic nanophotonics for structural coloring
  • Conceptual understanding of light-matter interaction in nano-structure
  • Research history of structural colors by photonic crystal, metamaterials and diverse photonic structures
  • Large-scale fabrication method and its use on structural colors
  • Tunable/dynamic optical response using various mechanism
  • Examples of practical application and future research direction


Dr. Joel Yang, Singapore University of Technology and Design

Joel K.W. Yang received his SM (2005) and PhD (2009) degrees from the Massachusetts Institute of Technology, Department of Electrical Engineering and Computer Science. He is an Associate Professor in the Engineering Product Development pillar at the Singapore University of Technology and Design and holds a joint appointment as Senior Scientist I at the Institute of Materials Research and Engineering of A*STAR. He is recognized for his pioneering work in plasmonic color printing, achieving record-level printing resolution at 100,000 dpi. He is also credited for the widely-used “salty-developer” to improve the resolution of electron beam lithography. He serves as an Associate Editor of Optics Express, and as a member of the Editorial Advisory Board of ACS Photonics. Recent recognitions include the A*STAR Investigator Award, the MIT Technology Review TR35@Singapore award, and the Singapore Young Scientist Award.

Dr. Robert Simpson, Singapore University of Technology and Design

Rob is currently an Assistant Professor at the Singapore University of Technology and Design (SUTD), where he runs the Advanced Chalcogenides Technologies and Applications Lab ( Rob’s research is focussed on designing chalcogenides and applying them to applications in electronics, photonics, and data storage. Prior to joining SUTD Rob received his PhD from from the Optoelectronics Research Centre at the University of Southampton, spent 3.5 years at the Japanese national institute for Applied Industrial Science and technology (AIST) as a JSPS postdoctoral fellow, and one year at the Institut de Ciencies Fotoniques (ICFO), Barcelona. Rob’s research has been awarded a number of prizes including the Westminster medal and the AIST president's award.