Dr. Ing. habil Ajay K. Poddar

The ongoing effort by research scientists is to categorize MTM structure by effective constitutive parameters: e_r= n/z, µ_r = n´z, which gives a direct and an understandable interpretation of medium such as MTMs. But it is not easy to assign normalized impedance (z) to a MTM structure which is a non-homogeneous material, because z strongly depends on surface termination and overall size of the material. It is possible to retrieve values for the complex refractive index (n)and wave impedance (z) of inhomogeneous periodic NIMS structure, by prior information about termination of the NIMS-unit cell structure, phases and amplitudes of the waves transmitted/reflected from the NIMS sample. But the challenge is if the NIMS structures are not symmetric along the wave propagation direction, 2-different values of impedance (z) are retrieved corresponding to 2-incident directions of propagation. This ambiguity in the computation of impedance (z) leads to a fundamental ambiguity in the definitions of e and µ for MIMS, which increases as the ratio of NIMS unit cell dimension to wavelength increases. 

The unique electromagnetic properties provided by Metamaterial attract considerable attention of researchers from multiple disciplines. With the complete degree of freedom to control over material properties, what we could do next is only limited by our imagination. Magneto electric-couplings can be a source of new behavior in Casimir systems, Metamaterial Casimir repulsive effect can lead to anti-gravity and low cost solution for levitation. The Metasurface made of MIM can provide nearly infinite group delay, very helpful in understanding Einstein Precession, Geodetic Effect and new evidence that requires refining our understanding of the relativistic corrections to Newtonian Celestial Mechanics. 

Biography:

Reserach Group, Oreadea University, Romania

Email:

Address:Oradea, Romania

Dr. Ing. habil Ajay K. Poddar

Biography:

Email:

Address:Oradea, Romania