Zhang, Xiaohe Chen, Huanyang Luo, Xudong Ma, Hongru Media 3: Transformation media that turn a narrow slit into a large window Originally published in Optics Express on 04 August 2008 (oe-16-16-11764) media;oe;Optics Express;04 August 2008;slit;Transformation 2008-08-04
    https://opticapublishing.figshare.com/articles/media/Media_3_Transformation_media_that_turn_a_narrow_slit_into_a_large_window/4938044
10.1364/OE.16.011764.m003