Flat lensing in the visible frequency range by woodpile photonic crystals.
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.
Departament de Física i Enginyeria Nuclear, Universitat Politècnica de Catalunya, Terrassa, Spain. lina.maigyte@upc.edu
L
L
Maigyte
V
V
Purlys
J
J
Trull
M
M
Peckus
C
C
Cojocaru
D
D
Gailevičius
M
M
Malinauskas
K
K
Staliunas