Efficient optical coupling between nano‐ and macroscale areas is strongly suppressed by the diffraction limit. This work presents a possible solution to this fundamental problem via the experimental fabrication, characterization, and comprehensive theoretical analysis of structures referred to as “photonic funnels.” The funnels represent a novel composite material platform that combines hyperbolic dielectric response with geometry‐assisted optical confinement. Experimentally, funneling of mid‐infrared light through openings with diameters as small as 1/25th of the free space wavelength (λ0) is demonstrated. By analyzing the optical response of the funnels, as fabricated, both confinement of mid‐infrared radiation to the λ0/25 areas and efficient outcoupling of light from deep subwavelength areas are confirmed.
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Abstract -
LaMountain, J. ; Raju, A. ; Briggs, A. ; Wasserman, D. ; Podolskiy, V.A. ( , CLEO 2023)Photonic funnels have been demonstrated as a flexible platform to confine light to deep subwavelength spatial areas. Here we consider the utility of this platform to provide temporal, as well as spatial, light shaping.more » « less
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J. LaMountain, E. Simmons ( , Conference on Lasers and Electrooptics)
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Li, K. ; Simmons, E. ; Briggs, A. ; Xu, J. ; Cheng, Y. ; Chen, Ray T. ; Bank, S. ; Podolskiy, V.A ; Wasserman, D. ( , CLEO: QELS_Fundamental Science 2020)null (Ed.)