Entity

Time filter

Source Type

Livermore, CA, United States

Seshadri S.R.,4502 Phyllis Court
Journal of the Optical Society of America A: Optics and Image Science, and Vision | Year: 2014

The concept of irreversible and reversible powers and that of real and reactive powers are developed with particular reference to the surface polariton. The characteristics of the surface polariton excited by a current source are obtained. The limitations of the various propagation velocities are examined. It is shown that in the frequency range where the surface polariton is transparent, a physically meaningful transport velocity, or equivalently wave packet velocity, does not exist. © 2014 Optical Society of America. Source


Seshadri S.R.,4502 Phyllis Court
Journal of the Optical Society of America A: Optics and Image Science, and Vision | Year: 2012

In this communication, certain comments are made on the X-shaped field generated by a really superluminal (point) charge treated in Subsection 2.D in the paper by Zamboni-Rached et al., "Cherenkov radiation versus X-shaped localized waves," [J. Opt. Soc. Am. A 27, 928 (2010)]. © 2012 Optical Society of America. Source


Seshadri S.R.,4502 Phyllis Court
Journal of the Optical Society of America A: Optics and Image Science, and Vision | Year: 2014

The propagation characteristics of the fundamental Airy wave are obtained; the intensity distribution is the same as that for a point electric dipole situated at the origin and oriented normal to the propagation direction. The propagation characteristics of the modified fundamental Airy wave are determined. These characteristics are the same as those for the fundamental Gaussian wave provided that an equivalent waist is identified for the Airy wave. In general, the waves are localized spatially with the peak in the propagation direction. © 2013 Optical Society of America. Source


Seshadri S.R.,4502 Phyllis Court
Laser Science, LS 2014 | Year: 2014

A plane interface separating vacuum from free electron gas supports an inhomogeneous plane wave known as surface polariton. The energy transport velocity which equals the wave packet velocity is shown to be not physically meaningful. © OSA 2014. Source

Discover hidden collaborations