Direct Observation of Photonic Jets and Corresponding Backscattering Enhancement at Microwave frequencies

Details Direct Observation of Photonic Jets and Corresponding Backscattering Enhancement at Microwave frequencies Direct Observation of Photonic Jets and Corresponding Backscattering Enhancement at Microwave frequencies

2009-03-10

arxiv.org/abs/0903.1693v1

Physics

Optics

11 pages, 6 figures

Scientific paper

We experimentally verified the phenomena of photonic jets generated by plane-electromagnetic-wave-illuminated dielectric micro-cylinders with diameter comparable to the corresponding wavelength at microwave frequencies. Using a home-made 2D spatial field mapping system, we carried out a point-by-point measurement of both phase and intensity of spatial electric field distribution inside and around scattering cylinders, providing a clear complete electromagnetic field picture for these phenomena. Correspondingly, the theoretically predicted super-enhancement of the backscattering induced by small particles of deeply-subwavelength size located within the photonic jets was also confirmed. Our measurements agreed well with the numerical simulations, indicating that the photonic jets indeed can provide a promising powerful way for deeply subwavelength detection and imaging.

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