Subwavelength Position Sensing Using Nonlinear Feedback and Wave Chaos
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We demonstrate a position-sensing technique that relies on the inherent sensitivity of chaos, where we illuminate a subwavelength object with a complex structured radio-frequency field generated using wave chaos and nonlinear feedback. We operate the system in a quasiperiodic state and analyze changes in the frequency content of the scalar voltage signal in the feedback loop. This allows us to extract the object’s position with a one-dimensional resolution of =10 000 and a two-dimensional resolution of =300, where is the shortest wavelength of the illuminating source.
Published Version (Please cite this version)10.1103/PhysRevLett.107.254103
CitationCohen, S. D., H. L. D. de S. Cavalcante, et al. (2011). "Subwavelength Position Sensing Using Nonlinear Feedback and Wave Chaos." Physical Review Letters 107(25): 254103.
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Research Professor of Physics
Prof. Gauthier is interested in a broad range of topics in the fields of nonlinear and quantum optics, and nonlinear dynamical systems. In the area of optical physics, his group is studying the fundamental characteristics of highly nonlinear light-matter interactions at both the classical and quantum levels and is using this understanding to develop practical devices. At the quantum level, his group has three major efforts in the area of quantum communication and networking. I