|Title||Performance of a three dimensional transformation-optical-flattened Lüneburg lens|
|Publication Type||Journal Article|
|Year of Publication||2012|
|Authors||T. Driscoll, G. Lipworth, J. Hunt, N. Landy, N.B. Kundtz, D.N. Basov, D.R. Smith|
We demonstrate both the beam-forming and imaging capabilities of an X-band (8–12 GHz) operational Lüneburg lens, one side of which has been flattened via a coordinate transformation optimized using quasi-conformal transformation optics (QCTO) procedures. Our experimental investigation includes benchmark performance comparisons between the QCTO Lüneburg lens and a commensurate conventional Lüneburg lens. The QCTO Lüneburg lens is made from a metamaterial comprised of inexpensive plastic and fiberglass, and manufactured using fast and versatile numerically controlled water-jet machining. Looking forward towards the future and advanced TO designs, we discuss inevitable design trade-offs between affordable scalable manufacturing and rigorous adherence to the full TO solution, as well as possible paths to mitigate performance degradation in realizable designs.
|Short Title||Opt. Express|