Imaging with subwavelength resolution by a generalized superlens at infrared wavelengths.
We demonstrate experimentally negative refraction by a photonic crystal prism and imaging of a point source by a photonic crystal slab at 1.5 microm wavelength. The photonic crystal structures were nanofabricated in a InGaAsP/InP heterostructure platform, and optical characterization was performed using a near-field scanning optical microscope. By designing a suitable lens surface termination, an image spot size of 0.12lambda2 was achieved, demonstrating superlens imaging with subwavelength resolution well below Abbe's diffraction limit (0.5lambda2).
Casse
B D F
BD
Electronic Materials Research Institute, Department of Physics, Northeastern University, Boston, MA 02115, USA.
Lu
W T
WT
Banyal
R K
RK
Huang
Y J
YJ
Selvarasah
S
S
Dokmeci
M R
MR
Perry
C H
CH
Sridhar
S
S