We found a matchYour institution may have access to this item. Find your institution then sign in to continue.TitleNegative refraction in semiconductor metamaterials.AuthorsHoffman AJ; Alekseyev L; Howard SS; Franz KJ; Wasserman D; Podolskiy VA; Narimanov EE; Sivco DL; Gmachl CPublicationNature materials, 2007, Vol 6, Issue 12, p946ISSN1476-1122Publication typearticleDOI10.1038/nmat2033