Wavefront shaping of infrared light through a subwavelength hole[J]. LSA, 2012,1(1).
Chen, Y. H. et al. Wavefront shaping of infrared light through a subwavelength hole. Light: Science & Applications, 1, e26 (2012).
Wavefront shaping of infrared light through a subwavelength hole[J]. LSA, 2012,1(1). DOI: 10.1038/lsa.2012.26.
Chen, Y. H. et al. Wavefront shaping of infrared light through a subwavelength hole. Light: Science & Applications, 1, e26 (2012). DOI: 10.1038/lsa.2012.26.
Wavefront shaping of infrared light through a subwavelength hole
Light passing through a subwavelength hole in an opaque plate is a fundamental concern in both optical science and applications. Using both simulations and experiments
we show that
when a subwavelength hole in a silver thin
film is surrounded by well-designed patterns of grooves
the wavefront of the infrared light through it can be shaped into a preset complicated pattern such as a Latin letter 'L' or 'O' at a given position instead of being diffracted in all directions. The design is created
via
the surface-wave-holography method
which allows direct determination of the surface plasmonic structure for a given wavefront-engineering functionality without the need to solve complex inverse problems. The results will deepen current understanding of this enduring issue and will find applications in many fields such as wave manipulation and sensing.
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