We report on the time-domain differentiation of light waves by metallic transmission gratings. Time-resolved terahertz experiments show that the first time derivative of an arbitrary waveform can be achieved by use of gratings of subwavelength period. The results are in accord with classical diffraction theory and may permit novel applications for tailoring few-cycle light pulses and ultrahigh-frequency optoelectronics.
© 2001 Optical Society of America
(050.0050) Diffraction and gratings : Diffraction and gratings
(070.6020) Fourier optics and signal processing : Continuous optical signal processing
(220.0220) Optical design and fabrication : Optical design and fabrication
(300.6340) Spectroscopy : Spectroscopy, infrared
(300.6530) Spectroscopy : Spectroscopy, ultrafast
A. Filin, M. Stowe, and R. Kersting, "Time-domain differentiation of terahertz pulses," Opt. Lett. 26, 2008-2010 (2001)