Coming Colloquium


Department of Physics




Nonlinear and Chiral Plasmonics: Opportunities for Biophotonics


Professor Dangyuan Lei
Department of Applied Physics, The Hong Kong Polytechnic University, Hong Kong


Date: : Friday, 17 February 2017
Time: 10:30am – 11:30am (Tea will be served)
Venue: FSC703 Fong Shu Chuen Libary, HSH Campus


In this talk I will introduce a fast emerging research area of nanophotonics – plasmonics, which studies the nanoscale light-matter interaction and applies the enhanced electromagnetic response of metallic nanostructure resonators in a wide range of applications such as nanoscale optoelectronics, biosensing, bioimaging, and energy harvesting. Of our particular interest here is the recently developed nonlinear and chiral nanoplasmonics research because it has provided tremendous opportunities for the advancement of biophotonics. In the first part of this talk, I will discuss how the nonlinear plasmonics concepts and nanostructures can be used for the development of ultrasensitive molecular nanorulers for biosensing and highly efficient near-infrared multiphoton probes for bioimaging. In the second part, I will show how a plasmonic nanostructure interacts with chiral biomolecules, which enables switching and amplifying the molecular optical activity and, more importantly, probing the conformational evolution and structural rearrangement of the chemisorbed molecules on the nanostructure surface, thus constituting a promising stereochemically attuned nanosensor. I believe that the synergistic combination of nonlinear and chiral plasmonics research will provide a new paradigm for high-resolution, high-sensitivity molecular imaging, sensing and recognition.


• M. Konig et al., ACS Nano 8, 9188-9198 (2014).
• X. Zhang et al., Advanced Materials27, 1090-1096 (2015).
• S.-D. Liu et al., ACS Nano10, 1442-1453 (2016).
• S. Zhang et al., ACS Nano 10, 11105-11114 (2016).
• Z.Y. Bao et al., Angewandte Chemie International Edition 129, 1303-1308 (2016).
• Y.D. Hou et al., Advanced Functional Materials26, 7807-7815(2016).
• J.J. He et al., Light: Science & Applications, in press (2017).


Dangyuan Lei received his BSc and MPhil degrees, both in Physics, from Northwest University and The Chinese University of Hong Kong in 2005 and 2007, respectively. In October 2008, he went to Imperial College London to conduct his PhD study, under supervision by Prof. Stefan Maier and in long-term collaboration with Prof. Sir John Pendry, and obtained his PhD degree in Physics in 2011. He has been an assistant professor with the Department of Applied Physics at The Hong Kong Polytechnic University since September 2012. His main research activities include nanophotonics and nanomaterials studies, with particular interest in surface plasmon-enhanced light-matter interaction at the nanoscale and their applications in energy harvesting, optoelectronic devices, biochemical sensing and biomedical imaging. Since 2007, he has published 79 peer-review journal publications including 24 publications in Nature Communications, Light: Science & Applications, Nano Today, Advanced Materials, Advanced Functional Materials, Angewandte Chemie International Edition, Nano Letters, ACS Nano, Chemistry of Materials, Physical Review Letter, Energy & Environmental Science, and Nano Energy, with a total citation of 1950 times and an H-index of 26 (by Google Scholar as of February 2017). He has received several prestigious awards, including the “Deputy Rector’s Award” (2008-2011) and the “Anne Thorne PhD Thesis Prize” both from Imperial College London, the “Early Career Grants Award” from the Hong Kong Research Grants Council (2013), the Journal of Materials Chemistry C Emerging Investigator from the Royal Society of Chemistry (2016), and a Royal Society International Exchange award (2016).

All Interested Are Welcome!
For enquiry: 3411-5145