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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Controlling optical memory effects in disordered media with coated metamaterials

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Author(s):
Arruda, Tiago J. [1] ; Martinez, Alexandre S. [2, 3] ; Pinheiro, Felipe A. [4]
Total Authors: 3
Affiliation:
[1] Univ Sao Paulo, Inst Fis Sao Carlos, BR-13566590 Sao Carlos, SP - Brazil
[2] Univ Sao Paulo, Fac Filosofia Ciencias & Letras Ribeirao Preto, BR-14040901 Ribeirao Preto, SP - Brazil
[3] Natl Inst Sci & Technol Complex Syst, BR-22290180 Rio De Janeiro, RJ - Brazil
[4] Univ Fed Rio de Janeiro, Inst Fis, BR-21941972 Rio De Janeiro, RJ - Brazil
Total Affiliations: 4
Document type: Journal article
Source: Physical Review A; v. 98, n. 4 OCT 30 2018.
Web of Science Citations: 1
Abstract

Most applications of memory effects in disordered optical media, such as the tilt-tilt and shift-shift spatial correlations, have focused on imaging through and inside biological tissues. Here we put forward a metamaterial platform not only to enhance but also to tune memory effects in random media. Specifically, we investigate the shift-shift and tilt-tilt spatial correlations in metamaterials composed of coated spheres and cylinders by means of the radiative transfer equation. Based on the single-scattering phase function, we calculate the translation correlations in anisotropically scattering media with spherical or cylindrical geometries and find a simple relation between them. We show that the Fokker-Planck model can be used with the small-angle approximation to obtain the shift-tilt memory effect with ballistic light contribution. By considering a two-dimensional scattering system, composed of thick dielectric cylinders coated with subwavelength layers of thermally tunable magneto-optical semiconductors, we suggest the possibility of tailoring and controlling the shift-shift and tilt-tilt memory effects in light scattering. In particular, we show that the generalized memory effect can be enhanced by increasing the temperature of the system, and it can be decreased by applying an external magnetic field. Altogether our findings unveil the potential applications that metamaterial systems may have to control externally memory effects in disordered media. (AU)

FAPESP's process: 15/21194-3 - Interaction between atoms and metamaterials: Purcell effect and effective medium theories
Grantee:Tiago José Arruda
Support type: Scholarships in Brazil - Post-Doctorate