Electrodynamics of Left-Handed Medium
4-5 p.m., Thursday, 13 October, 2005 .
School of Physics
left-handed materials, negative refraction).
It has been shown earlier  that a two-dimensional photonic crystal (PC) made from a non-magnetic dielectric is a LHM in the sense defined by Veselago. A numerical simulation can find the negative values of e and µ. Using these values we the Veselago lens, a unique optical device predicted by Veselago, was simulated. The interest in LHM was significantly amplified by the work of Pendry  who argued that the Veselago lens is a ''perfect lens'' in the sense that it gives a perfect image of the point source. This statement is based upon the observation that the evanescent waves (EW's) that usually decay in the near field region are amplified by the LHM. Pendry claimed that the amplified EW’s restore a perfect image.
It is shown in this paper that negative e and µ recently discovered in a PC are properties of propagating modes only. The EW’s rather decay than increase in the bulk of the crystal if a surface does not support surface waves. If it does, the EW’s may improve the image of the lens. The diffraction limit for the Veselago lens is presented.
 V. G. Veselago: Sov. Phys.-Solid State Vol. 8 (1967), p. 2854.
 A. L. Efros, A. L. Pokrovsky: Solid State Comm. Vol. 129 (2004), p.643.
 J. B. Pendry: Phys. Rev. Lett. Vol. 85 (2000), p. 39.
The audience, including graduate students, are invited to meet the speaker 15 minutes beforehand over wine and cheese in the Physics Common Room.