Single-pixel Coherent Diffraction Imaging

We demonstrate single-pixel coherent diffraction imaging, whereby broadband terahertz (THz) waveforms passed through a slated phase retarder (SPR), diffracted from an object, were measured by a THz detector located in the far field. For 1D imaging, the fixed-location single-pixel broadband detector simultaneously measured all the spatial frequency components of the object because the frequency components of the source maintain a one-to-one correspondence with the object's spatial frequency. For 2D imaging, the angular position of the SPR enabled the diffracted THz wave to carry an angular projection image of the object. Thirty waveforms measured at different SPR orientations successfully reconstructed complex 2D images.

Kanghee Lee and Jaewook Ahn, "Single Pixel Coherent Diffraction Imaging," Appl. Phys. Lett. 97, 241101 (Dec. 13, 2010). Media:KangheeAPL2010b.pdf, featured on cover. http://apl.aip.org/free_media/issue_files/APPLAB/97_24.pdf