So using one antenna and a random medium to locate "things" we've heard that one before :-) Lianlin and colleagues explore this new capability and even provide us a phase transition map, what else can you ask ?
Far-field subwavelength imaging from a single broadband antenna in combined with strongly disordered medium by Lianlin Li, Fang Li, Tie Jun Cui
The far-field subwavelength imaging is a challenging issue. In this letter we demonstrate numerically that the far-field subwavelength imaging of weakly scattering objects can be obtained by processing the data acquired by a single antenna, which benefits from the use of the strongly disordered medium. A mathematical model has been proposed for solving such problem based on the idea of sparse reconstruction. Moreover, this study leads to an important conclusion that the strongly disordered medium can serves as an efficient apparatus for the single-antenna compressive measurement, which shifts the complexity of devising compressive sensing (CS) hardware from the design, fabrication and electronic control. The proposed method and associated results can find applications in several imaging disciplines, such as optics, THz, RF or ultrasound imaging.
Subwavelength imaging of sparse broadband sources surrounded by an open disordered medium from a single antenna by Lianlin Li, Fang Li, Tie Jun Cui
In this letter we study the subwavelength imaging of sparse broadband sources inside a disordered medium by processing the data acquired by a single antenna. A mathematical model has been developed for solving such problem based on the idea of sparse reconstruction. We show that the strongly disordered medium can serves as an efficient apparatus for compressive measurement, which shifts the complexity of devising compressive sensing (CS) hardware from the design, fabrication and electronic control. The proposed method and associated results can find applications in several imaging disciplines, such as optics, THz, RF or ultrasound imaging.
Highly relevant:
Subwavelength focusing inside an open disordered medium by time reversal at a single point antenna by Romain Pierrat, Cédric Vandenbem, Mathias Fink, Rémi Carminati
We study theoretically light focusing at subwavelength scale inside a disordered strongly scattering open medium. We show that broadband time reversal at a single point antenna, in conjunction with near-field interactions and multiple scattering, produces spatial focusing with a quality comparable to that obtained in an ideal closed cavity. This gives new perspectives for super-resolved optical imaging and coherent control of single nanosources or absorbers in complex media.h/t Sylvain Gigan.
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