A Flat Lens with Tunable Phase Gradient by Using Random Access Reconfigurable Metamaterial

The first demonstration of an optofluidic metamaterial is reported where resonant properties of every individual metamolecule can be continuously tuned at will using a microfluidic system. This is called a random-access reconfigurable metamaterial, which is used to provide the first demonstration of a tunable flat lens with wavefront-reshaping capabilities.? 2015 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.Singapore National Research Foundation under Environmental & Water Technologies Strategic Research Programme [1102-IRIS-05]; Singapore Ministry of Education (MOE) [MOE2011-T3-1-005, RG 89/13]; EPSRC (UK) Programme on Nanostructured Photonic Metamaterials; National Science Council of Taiwan [NSC 101-2811-P-002-004, NSC 102-2745-M-002-005-ASP]SCI(E)EIPubMedARTICLEeaqliu@ntu.edu.sg; nzheludev@ntu.edu.sg324739-47432