Title :
Does evanescent gain exist?
Author :
Grepstad, Jon Olav ; Skaar, Johannes
Author_Institution :
Dept. of Electron. & Telecommun., Norwegian Univ. of Sci. & Technol., Trondheim, Norway
Abstract :
We have investigated the situation where light incident from a passive high-refractive-index medium is totally reflected off an infinite half space with gain. The question of whether or not evanescent gain can prevail in this case, has been at issue for 40 years. We argue that the controversy can be resolved for week gain media using the Laplace transform, combined with a detailed analysis of analytic and global properties of the permittivity function of the active medium.
Keywords :
Laplace transforms; light reflection; permittivity; refractive index; Laplace transform; evanescent gain; passive high-refractive-index medium; permittivity function; total reflection; Frequency domain analysis; Laplace equations; Media; Optimized production technology; Permittivity; System-on-a-chip; Time domain analysis;
Conference_Titel :
General Assembly and Scientific Symposium, 2011 XXXth URSI
Conference_Location :
Istanbul
Print_ISBN :
978-1-4244-5117-3
DOI :
10.1109/URSIGASS.2011.6123712
