F. Zhang, K. S. Holliday, P. E. Lammert and V. H. Crespi, "An algorithm to sculpt photon dispersion in a subwavelength nanostructure," Appl. Phys. Lett. 94, 041115 (2009)

We introduce a method of gradient-based optimization that continuously deforms a periodic dielectric distribution to generate photonic structures that possess any desired figure of merit expressible in terms of the electromagnetic eigenmodes. As an example, we generate forbidden regions between specified bands at extremely low dielectric contrast.

Comments:
Selected for the February 9, 2009 issue of Virtual Journal of Nanoscale Science & Technology, http://www.vjnano.org/