Flat lensing in the visible frequency range by woodpile photonic crystals
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We experimentally demonstrate full two-dimensional focalization of light beams at visible frequencies by a three-dimensional woodpile photonic crystal. The focalization (the flat lensing) with focal distances of the order of 50–70 µm is experimentally demonstrated. Experimental results are compared with numerical calculations and interpreted by harmonic expansion studies.
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CitacióMaigyte, L. [et al.]. Flat lensing in the visible frequency range by woodpile photonic crystals. "Optics letters", 15 Juliol 2013, vol. 38, núm. 14, p. 2376-2378.