Coherent optical computing for T-ray imaging.
Single-point imagery of 2D objects is proposed by exploiting the extreme broadband nature of an ultrafast terahertz wave. In the proposed imagery, a collimated terahertz beam is illuminated on an object, and the scattered fields are measured through a hole at the Fourier plane in a conventional terahertz time-domain spectroscope. This arrangement allows conversion of radial spatial frequencies of the object to the temporal spectrum of the pulse. Hence, a 2D image can be readily obtained by rotating a hole around the optical axis. Experimental results confirm that a complicated object can be reliably imaged using only 30 waveform measurements.
Lee
Kanghee
K
Department of Physics, Korean Advanced Institute of Science and Technology, Daejeon 305-701, Korea.
Jin
Kyung Hwan
KH
Ye
Jong Chul
JC
Ahn
Jaewook
J
D007091:Image Processing, Computer-Assisted / Q000379:methods*; D055620:Optical Phenomena; D011827:Radiation; D013997:Time Factors