We demonstrate how micromachined photonic crystals can be used to negatively refract terahertz frequency light. The photonic crystals, which are constructed from conventional dielectric materials, manipulate the incident beam via interaction with their photonic bands. Consequently, we show that different components of a broadband beam incident on the structure may be positively or negatively refracted, depending upon its frequency and that the structure can be used as an effective spectral filter of THz radiation.
© 2011 Optical Society of America
Original Manuscript: January 5, 2011
Revised Manuscript: March 14, 2011
Manuscript Accepted: March 22, 2011
Published: April 28, 2011
G. P. Swift, A. J. Gallant, N. Kaliteevskaya, M. A. Kaliteevski, S. Brand, D. Dai, A. J. Baragwanath, I. Iorsh, R. A. Abram, and J. M. Chamberlain, "Negative refraction and the spectral filtering of terahertz radiation by a photonic crystal prism," Opt. Lett. 36, 1641-1643 (2011)