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Title: Hidden black : coherent enhancement of absorption in strongly scattering media
Authors: Chong, Yidong
Stone, A. Douglas
Keywords: DRNTU::Science::Physics
Issue Date: 2011
Source: Chong, Y., & Stone, A. D. (2011). Hidden black : coherent enhancement of absorption in strongly scattering media. Physical review letters, 107(16), 163901.
Series/Report no.: Physical review letters
Abstract: 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.
DOI: 10.1103/PhysRevLett.107.163901
Schools: School of Physical and Mathematical Sciences 
Rights: © 2011 American Physical Society. This paper was published in Physical Review Letters and is made available as an electronic reprint (preprint) with permission of American Physical Society. The paper can be found at the following official DOI:  One print or electronic copy may be made for personal use only. Systematic or multiple reproduction, distribution to multiple locations via electronic or other means, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper is prohibited and is subject to penalties under law.
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:SPMS Journal Articles

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