Abstract
By manipulating the principal stretches during a two-step space mapping within the framework of transformation optics, the input spatial frequency bandwidth of a conventional Fourier lens can be extended based on an isotropic transformation material. Isotropy is important for easy fabrication, low loss, and broadband application; moreover, it suggests a route for realizing Fourier transforms of continuous fractional order with enhanced input spatial frequency bandwidth.
| Original language | English |
|---|---|
| Article number | 060501 |
| Journal | Optical Engineering |
| Volume | 52 |
| Issue number | 6 |
| DOIs | |
| Publication status | Published - Jun 2013 |
Keywords
- conformal mapping
- fractional Fourier transform
- graded index
- transformation optics