Time Reversal in Subwavelength-Scaled Resonant Media : Beating the Diffraction Limit
Joint Authors
Ourir, Abdelwaheb
Lerosey, Geoffroy
Fink, Mathias
de Rosny, Julien
Tourin, Arnaud
Lemoult, Fabrice
Source
International Journal of Microwave Science and Technology
Issue
Vol. 2011, Issue 2011 (31 Dec. 2011), pp.1-14, 14 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2011-09-28
Country of Publication
Egypt
No. of Pages
14
Main Subjects
Abstract EN
Time reversal is a physical concept that can focus waves both spatially and temporally regardless of the complexity of the propagation medium.
Time reversal mirrors have been demonstrated first in acoustics, then with electromagnetic waves, and are being intensively studied in many fields ranging from underwater communications to sensing.
In this paper, we will review the principles of time reversal and in particular its ability to focus waves in complex media.
We will show that this focusing effect depends on the complexity of the propagation medium rather than on the time reversal mirror itself.
A modal approach will be utilized to explain the physical mechanism underlying the concept.
A particular focus will be given on the possibility to break the diffraction barrier from the far field using time reversal.
We will show that finite size media made out of coupled subwavelength resonators support modes which can radiate efficiently in the far field spatial information of the near field of a source.
We will show through various examples that such a process, due to reversibility, permits to beat the diffraction limit using far field time reversal, and especially that this result occurs owing to the broadband inherent nature of time reversal.
American Psychological Association (APA)
Lemoult, Fabrice& Ourir, Abdelwaheb& de Rosny, Julien& Tourin, Arnaud& Fink, Mathias& Lerosey, Geoffroy. 2011. Time Reversal in Subwavelength-Scaled Resonant Media : Beating the Diffraction Limit. International Journal of Microwave Science and Technology،Vol. 2011, no. 2011, pp.1-14.
https://search.emarefa.net/detail/BIM-471199
Modern Language Association (MLA)
Lemoult, Fabrice…[et al.]. Time Reversal in Subwavelength-Scaled Resonant Media : Beating the Diffraction Limit. International Journal of Microwave Science and Technology No. 2011 (2011), pp.1-14.
https://search.emarefa.net/detail/BIM-471199
American Medical Association (AMA)
Lemoult, Fabrice& Ourir, Abdelwaheb& de Rosny, Julien& Tourin, Arnaud& Fink, Mathias& Lerosey, Geoffroy. Time Reversal in Subwavelength-Scaled Resonant Media : Beating the Diffraction Limit. International Journal of Microwave Science and Technology. 2011. Vol. 2011, no. 2011, pp.1-14.
https://search.emarefa.net/detail/BIM-471199
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-471199