Predicted new electromagnetic precursors and altered signal velocity in dispersive media |
| |
| Authors: | Joseph L Birman Michael J Frankel |
| |
| Institution: | Physics Department, City College of the CUNY, New York, N.Y. 10031, USA;Physics Department, New York University, New York, N.Y. 10003, USA |
| |
| Abstract: | New optical precursors are predicted in media exhibiting “non-conventional” dispersion characteristics such as spatial dispersion, surface polaritons and surface plasmons. Numerical estimates are given for the exciton and surface polariton precursors in CdS, and surface plasmon in Al. The signal velocity increases in spatially dispersive media and is essentially constant throughout the “stop” gap. Measurement of these effects may provide new spectroscopic information regarding “non-conventional” dispersion. |
| |
| Keywords: | |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
