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.
© 2013 Optical Society of America
Original Manuscript: March 14, 2013
Revised Manuscript: June 3, 2013
Manuscript Accepted: June 3, 2013
Published: July 3, 2013
L. Maigyte, V. Purlys, J. Trull, M. Peckus, C. Cojocaru, D. Gailevičius, M. Malinauskas, and K. Staliunas, "Flat lensing in the visible frequency range by woodpile photonic crystals," Opt. Lett. 38, 2376-2378 (2013)