Sub-diffraction-limited far-field imaging in infrared |
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Authors: | Pratik Chaturvedi and Nicholas X Fang |
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Institution: | (1) Department of Electrooptic Engineering, Ben Gurion University of the Negev, Beer Sheva, 84104, Israel |
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Abstract: | We investigated a far-field superlens operating at mid-infrared wavelength that allows resolving subwavelength features in
the far-field. By utilizing evanescent enhancement provided by surface plasmon excitation of silver nanorods and Moiré effect,
we numerically demonstrated that subwavelength information of an object can be converted to propagating information. This
information can then be captured by conventional optical components. A simple image reconstruction algorithm can restore the
subwavelength object. A sub-diffraction-limited resolution of 2.5 μm at 6-μm wavelength is demonstrated. |
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