Home People Honorary Staff YU Kin Wah

Education:

• PhD, University of California, Los Angeles, 1984
• MSc, University of California, Los Angeles, 1980
• BSc, The Chinese University of Hong Kong, 1977

Position:

• 2015-now, Adjunct Professor, Department of Physics, The Chinese University of Hong Kong
• 1997-2015, Professor, Department of Physics, The Chinese University of Hong Kong
• 1994-1997, Associate Professor, Department of Physics, The Chinese University of Hong Kong
• 1990-1994, Lecturer, Department of Physics, The Chinese University of Hong Kong
• 1987, Visiting Research Scholar, University of California, Los Angeles
• 1985-1990, Lecturer, Hong Kong Polytechnic
• 1984-1985, IBM Research Fellow, Ohio State University
• 1984, Postdoctoral Research Fellow, University of California, Los Angeles

Research Interests:

• Condensed Matter Physics
• Computational Physics

Honours and Awards:

• JSPS Fellowship for Research in Japan (FY2006), Japan Society for the Promotion of Science (2006) on Project "Theoretical Study of Localized Excitations in Graded Materials: Gradons and Their Properties"
• Advancement of Science and Technology Award, Ministry of Machinery Industry, China (December 1998) on Project "Physics of Linear and Nonlinear Composite Materials"
• Advancement of Science and Technology Award, Ministry of Machinery and Electronics Industry, China (December 1992) on Project "First Principles Studies of Static and Dynamic Properties of Composite Materials"

Professional Activities:

• 2004-now, Expert Consultant, Hokkaido University, Sapporo, Japan
• 2003-now, Advisory Professor, East China Normal University, Shanghai, China
• 2002-2005, Adjunct Professor, Suzhou University, Suzhou, China
• 2000, Member, Local Organizing Committee, The Third Meeting of World Wide Chinese Physicists
• 1997, Member, International Scientific Advisory Committee, The 4th International Conference on Computational Physics
• 1993, Member, Local Organizing Committee, Hong Kong Workshop on Computational Physics

External Research Grants:

• RGC Earmarked Grant (2006-2009): Nano-Optics in Graded Plasmonic Crystals
• RGC Earmarked Grant (2004-2006): First-Principles Approach to Graded-Particle Composites
• RGC Earmarked Grant (2003-2005): Electrokinetic Behavior of Suspensions under AC Applied Fields
• RGC Earmarked Grant (2001-2003): First-Principles Approach to Dielectric Behavior of Non-Spherical Cell Suspensions
• RGC Earmarked Grant (2000-2002): First-Principles Approach to Dynamic Electrorheological Effects in Complex Fluids

Published Books:

• J. P. Huang and K. W. Yu, "New Nonlinear Optical Materials: Theoretical Research", Nova Science Publishers, Inc., New York (2007). [Monograph]
• J. J. Xiao, K. Yakubo and K. W. Yu, "Graded Plasmonic Structures and Their Properties", Chapter in Book "Plasmons: Theory and Applications", Nova Science Publishers, Inc., New York (2010). (In Press)

Selected Recent Publications:

• Y. Gao, J.P. Huang, Y.M. Liu, L. Gao, K.W. Yu and X. Zhang, "Optical negative refraction in ferrofluids with magneto-controllability", Phys. Rev. Lett. 104, 034501 (2010).
  The research work has been reported by New Scientist entitled: How to make a liquid invisibility cloak, as well as by Science News entitled: Liquid light bender proposed: Tiny nanoparticles dispersed in fluid may hide objects.
• G. Wang, J.P. Huang and K.W. Yu, "Tunable photonic Bloch oscillations in electrically modulated photonic crystals", Opt. Lett. 33, 2200 (2008). [e-print]
  See Opt. Lett. 34, 1777 (2009) for tunable photonic dipole oscillations and Opt. Lett. 35, 1908 (2010) for nontrivial effects due to second-order couplings in similar systems.
• J.P. Huang and K.W. Yu, "Enhanced nonlinear optical responses of materials: Composite effects", Phys. Rep. 431, 87 (2006).
• J.J. Xiao, K. Yakubo and K.W. Yu, "Optical switching in graded plasmonic waveguides", Appl. Phys. Lett. 88, 241111 (2006). [e-print]
  A variety of plasmonic gradons and their transition in graded plasmonic waveguides were reported in Appl. Phys. Lett. 89: 221503 (2006) or [e-print]; an interplay between gradon localization and various plasmonic oscillations has been reported in J. Appl. Phys. 106, 113307 (2009) or [e-print]; see also Nano Lett. 8, 2369 (2008) for a more recent study using fully retarded dipole interaction.
• J.J. Xiao and K.W. Yu, "Giant enhanced optical nonlinearity of colloidal nanocrystals with a graded-index host", Appl. Phys. Lett., 88, 071911 (2006). [e-print]
  For details of Lekner-Lishchuk formulation for dipole lattice sum, see Opt. Commun. 272, 252 (2007)
• J.J. Xiao, K. Yakubo and K.W. Yu, "Harmonic vibrational excitations in graded elastic networks: Transition from phonons to gradons", Phys. Rev. B 73, 054201 (2006). [e-print]
  See Phys. Rev. B 73, 224201 (2006) and J. Phys. Soc. Jpn. 76, 024602 (2007) for gradons in higher dimensional elastic lattices. Implication of gradons on thermal conduction and rectification in elastic lattices with mass gradient was reported in Phys. Rev. B 76, 020301(R) (2007) or [e-print]


Total Number of SCI Publications (up to June 2010) = 220