| AVS 54th International Symposium | |
| Plasmonics Topical Conference | Monday Sessions |
| Session PL-MoA |
| Session: | Plasmon Dynamics and Magnetoplasmonics |
| Presenter: | P. Guyot-Sionnest, University of Chicago |
| Authors: | P. Guyot-Sionnest, University of Chicago M. Liu, University of Chicago |
| Correspondent: | Click to Email |
The optical absorption and scattering of metal colloids is strongly shape dependent due to collective Plasmon resonances. Such particles are attractive for future optical integration. In particular, very large local electric field can also be achieved, both inside and outside the metal particles, providing means to locally enhance the linear and nonlinear optical response of the colloids and their environment. Of primary interest are structures in which one plasmon mode dominates the spectral response. These are typically elongated structures which exhibit the narrowest spectral response and large field enhancements. An example of such structure is an elongated bipyramid shape recently synthesized for Au colloids. For small particles in the dipole limit, the limiting linewidth of a Plasmon is due to dissipation inherent to the metal and to additional effects of the surface. In this context I will describe Au/Ag core/shell systems. Finally, achieving large nonlinear optical response, so that fast optical switching can be made at the single particle level is an ongoing challenge and initial results on Au nanorods will be presented.