Journal
PHYSICAL REVIEW LETTERS
Volume 107, Issue 16, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.107.163901
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Funding
- NSF [DMR-0908437, ECCS-1068642]
- Yale University Faculty of Arts and Sciences High Performance Computing Center
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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 similar to(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.
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