170 likes | 189 Views
Explore the advanced imaging capabilities of Photonic Band Gap technology and negative index materials in collaboration between UCSD and MIT. Dive into the data summary from UCSD Group's special testing apparatus to understand transverse field profiles, near/far field imaging, and the intricacies of curved lenses and metamaterials. Learn about the focusing performance, optical aberration coefficients, and ideal point focusing through Gaussian optical formulas. Compare isotropic and indefinite lens aberrations for enhanced imaging techniques.
E N D
Close Up of Sample Top View Photonic Band Gap Negative Index Imaging Collaboration of the UCSD and MIT (Joannopoulos/Chen Groups) Data Summary of UCSD Group
40mm 6.0185 GHz 1mm 80mm -80mm 2D Mapping (u=1.9mm, Hole Centered)
Focuses Near Fields Super resolution imaging Super resolution illumination Focuses far fields Antennas Far field imaging Why Curved Lenses? Slabs (“Perfect Lens”) Curved Lenses
Why Metamaterials? • Focusing performance • Matching • Compactness • Weight
Focusing PerformanceOptical Aberration Coefficients • Spherical • Coma • Astigmatism • Field curvature • Distortion Gaussian optical formulas describe ideal point focusing. Aberration coefficients describe the deviation of a focus from an ideal point.
x z Optical Aberrations Coefficients y z c200 spherical c110 coma c020 astigmatism c101 field curvature c011 distortion
Spherical Coma Astigmatism Field curvature Distortion Isotropic
Spherical Coma Astigmatism Field curvature Distortion Indefinite