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We report on the fabrication of large-area aluminum plasmonic perfect absorber (Al-PA) using colloidal lithography combined with reactive ion etching process. Using the Al-PA, we demonstrate selective thermal emitters and tailor-made molecular vibrational sensing.
It is experimentally demonstrated that subwavelength holes milled in a metallic film as a set of concentric circular rings can focus linearly polarized light in the visible range.
We experimentally demonstrate a phase hologram generated at a visible wavelength by a plasmonic metasurface consisting of Babinet-inverted nano-antennas perforated on a 30-nm-thick gold film. Micrometer-sized planar lenses are made with the same technique.
Our experiment demonstrates a subwavelength-wide peak from double-slit diffraction inside a slab with hyperbolic dispersion; this highly localized field can be used for subwavelength probes.
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