Document Detail

Hidden black: coherent enhancement of absorption in strongly scattering media.
MedLine Citation:
PMID:  22107384     Owner:  NLM     Status:  In-Data-Review    
We show that a weakly absorbing, strongly scattering (white) medium can be made very strongly absorbing at any frequency within its strong-scattering bandwidth by optimizing the input electromagnetic field. For uniform absorption, results from random matrix theory imply that the reflectivity of the medium can be suppressed by a factor ∼(ℓ_{a}/ℓ)N^{-2}, where N is the number of incident channels and ℓ, ℓ_{a} are the elastic and absorption mean free paths, respectively. It is thus possible to increase absorption from a few percent to >99%. For a localized weak absorber buried in a nonabsorbing scattering medium, we find a large but bounded enhancement.
Y D Chong; A D Stone
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Publication Detail:
Type:  Journal Article     Date:  2011-10-12
Journal Detail:
Title:  Physical review letters     Volume:  107     ISSN:  1079-7114     ISO Abbreviation:  Phys. Rev. Lett.     Publication Date:  2011 Oct 
Date Detail:
Created Date:  2011-11-23     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0401141     Medline TA:  Phys Rev Lett     Country:  United States    
Other Details:
Languages:  eng     Pagination:  163901     Citation Subset:  IM    
Department of Applied Physics, Yale University, New Haven, Connecticut 06520, USA.
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