Document Detail

Total internal reflection and evanescent gain.
MedLine Citation:
PMID:  22108990     Owner:  NLM     Status:  In-Data-Review    
Total internal reflection occurs for large angles of incidence, when light is incident from a high-refractive-index medium onto a low-index medium. We consider the situation where the low-index medium is active. By invoking causality in its most fundamental form, we argue that evanescent gain may or may not appear, depending on the analytic and global properties of the permittivity function. For conventional, weak gain media, we show that there is an absolute instability associated with infinite transverse dimensions. This instability can be ignored or eliminated in certain cases, for which evanescent gain prevails.
Jon Olav Grepstad; Johannes Skaar
Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Optics express     Volume:  19     ISSN:  1094-4087     ISO Abbreviation:  Opt Express     Publication Date:  2011 Oct 
Date Detail:
Created Date:  2011-11-23     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  101137103     Medline TA:  Opt Express     Country:  United States    
Other Details:
Languages:  eng     Pagination:  21404-18     Citation Subset:  IM    
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