Anomalous Reflection From a Phase Gradient Metasurface With Arbitrary Incident Angle

Active impedance metasurface with full 360° reflection phase tuning

Impedance metasurface is composed of electrical small scatters in two dimensional plane, of which the surface impedance can be designed to produce desired reflection phase. Tunable reflection phase can be achieved by incorporating active element into the scatters, but the tuning range of the reflection phase is limited. In this paper, an active impedance metasurface with full 360° reflection ph...

Apparent Negative Reflection with the Gradient Acoustic Metasurface by Integrating Supercell Periodicity into the Generalized Law of Reflection

As the two dimensional version of the functional wavefront manipulation metamaterial, metasurface has become a research hot spot for engineering the wavefront at will with a subwavelength thickness. The wave scattered by the gradient metasurface, which is composed by the periodic supercells, is governed by the generalized Snell's law. However, the critical angle that derived from the generalize...

Broadband Anomalous Reflection Based on Gradient Low-Q Meta-Surface

Convective Heat Transfer from a Heated Rotating Disk at Arbitrary Inclination Angle in Laminar Flow

In this paper, experimental data and numerical results of heat transfer from a heated rotating disk in still air are presented over a large range of inclination angles and a dimensionless correlation is developed for forced, natural and mixed convection. The measured Nusselt number over the rotating disk is compared with the numerical results. The goal of the present research is to develop a se...

Ultrathin gradient nonlinear metasurface with a giant nonlinear response

NISHANT NOOKALA, JONGWON LEE, MYKHAILO TYMCHENKO, J. SEBASTIAN GOMEZ-DIAZ, FREDERIC DEMMERLE, GERHARD BOEHM, KUEIFU LAI, GENNADY SHVETS, MARKUS-CHRISTIAN AMANN, ANDREA ALU,* AND MIKHAIL BELKIN Department of Electrical and Computer Engineering, The University of Texas at Austin, Austin, Texas 78712, USA School of Electrical and Computer Engineering, Ulsan National Institute of Science and Techno...