Focusing properties of near-field time reversal

Journal Article · Sat Dec 15 00:00:00 EST 2007 · Physical Review. A

DOI:https://doi.org/10.1103/PHYSREVA.76.065801· OSTI ID:21140721

Rosny, Julien de; Fink, Mathias ^[1]

---

1. Laboratoire Ondes et Acoustique, CNRS/ESPCI/Universite Paris VII, UMR 7587, 10 rue Vauquelin, 75005 Paris (France)

A time-reversal mirror (TRM) is a plane apparatus that generates the time symmetric of a wave produced by an initial source. Here we look for the conditions to obtain subwavelength focusing when the initial source is in the near field of the TRM and the propagating medium is homogeneous and isotropic. Three variants of TRM are studied: TRM made of monopoles, dipoles, or both of them. The analysis is performed in terms of evanescent and propagative waves. We conclude that only the dipole-TRM leads to subwavelength focusing.

• OSTI ID: 21140721
• Journal Information: Physical Review. A, Vol. 76, Issue 6; Other Information: DOI: 10.1103/PhysRevA.76.065801; (c) 2007 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 1050-2947
• Country of Publication: United States
• Language: English

Related Subjects

46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
DIPOLES
EQUIPMENT
FOCUSING
IMAGE PROCESSING
IMAGES
LIGHT TRANSMISSION
MIRRORS
MONOPOLES