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Published February 1, 2005 | public
Journal Article Open

Hybrid superprism with low insertion losses and suppressed cross-talk


We demonstrate with the two-dimensional finite-difference time-domain method that an adiabatic transition in a superprism with an interface along the [1 [overline 2]] direction enhances the transmission through the superprism to more than 90% (–0.5 dB) over the wavelength range 1.47–1.68 µm, including the telecommunication C and L bands. We also show that diffraction governed by a quasinegative index of refraction inside the superprism can be used to obtain nearly transform-limited beam widths at the output of the superprism. The reduction of the beam width at the output suppresses cross-talk and greatly enhances the achievable frequency resolution of the superprism.

Additional Information

©2005 The American Physical Society (Received 15 July 2004; revised 13 October 2004; published 11 February 2005; corrected 10 March 2005) The authors wish to acknowledge generous support from DARPA under Contract No. N-00421-02-D3223, and the AFOSR under Contract No. F49620-03-1-0418. See Also * Publisher's Note: Hybrid superprism with low insertion losses and suppressed cross-talk [Phys. Rev. E 71, 026604 (2005)] Jeremy Witzens et al. Phys. Rev. E 71, 039904 (E) (2005)


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