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Surface plasmons (SP) are waves that propagate along the surface of a metal. Upon light illumination, the free electrons of the metal respond collectively by oscillating in resonance with the light wave. The use of surface plasmons to concentrate light in subwavelength structures stems from the different permittivities of the metals and the surrounding non-conducting media. SPs offer much shorter wavelength compared to the excitation light wavelength and strong enhancement for the coming light. These features make surface plasmons very attractive for nanolithography, bio-sensing, and nanophotonics. Our group investigates plasmonic nanolithography and plasmonic nanooptics.
Representative Publications:
A. Battula and S. C. Chen, “Monochromatic Polarized Coherent Emitter Enhanced by Surface Plasmons and Cavity Resonance”, Physical Review B, Vol. 74 (24), pp. 245407 (1-7), 2006.
D.B. Shao and S.C. Chen, “Direct Patterning of Three-dimensional Periodic Nanostructures by Surface Plasmon Assisted Nanolithography”, Nano Letters, Vol. 6 (10), pp. 2279-2283, 2006.
L.H. Han, T.J. Tang, S.C. Chen, “Turning the Absorption of Au Nanospheres on a Micro-Shell by Photo-Deformation”, Nanotechnology, Vol. 17, pp.4600-4605, 2006.
A. Battula and S. C. Chen, “Extraordinary Transmission in a Narrow Energy Band for Metallic Nano-gratings with Converging-Diverging Channels”, Applied Physics Letters, Vol.89 (13), 131113, 2006. (The paper was also selected to publish in the October 9, 2006 issue of Virtual Journal of Nanoscale Science & Technology).
D.B. Shao, and S.C. Chen, “Surface-Plamon-Assisted Nanoscale Photolithography by a Polarized Light”, Applied Physics Letters, Vol. 86, pp. 2531071-2531073, 2005. (The paper was also selected to publish in the June 27, 2005 issue of Virtual Journal of Nanoscale Science & Technology).
D.B. Shao, and S.C. Chen, “Numerical Simulation of Surface-Plasmons-Assisted Nanolithography”, Optics Express, Vol. 13 (18), pp. 6964-6973, 2005.
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