Self-consistent calculation of metamaterials with gain

Microstrip Antenna Gain Enhancement using Near Zero Refractive Index Metamaterials

Some useful features of microstrip patch antennas are low profile, low weight and easy fabrication. However this type of antenna suffers from having a low gain, caused by propagation surface waves. In this paper, a new near zero refractive index metamaterial (MTM) unit cell is designed and fabricated as a superstrate over a Rectangular Microstrip Patch Antennas (RMPA). In order to obtain a maxi...

Self-consistent relativistic calculation of nucleon mean free path.

We present a fully self-consistent and relativistic calculation of the nucleon mean free path in nuclear matter and finite nuclei. Starting from the Bonn potential, the Dirac-Brueckner-Hartree-Fock results for nuclear matter are parametrized in terms of an effective σ-ω Lagrangian suitable for the relativistic density-dependent Hartree-Fock (RDHF) approximation. The nucleon mean free path in nu...

K-line emission profiles with focus on the self-consistent calculation of plasma polarization

The emitted Kα-spectra of moderately ionized titanium radiators in a medium are used to determine plasma temperature and composition in electron heated target regions. A theoretical treatment of spectral line profiles using selfconsistent Hartree–Fock and ion sphere model calculations to determine the influence of plasma polarization is applied. We confirm the importance of excited emitter stat...

Loss-compensated broadband epsilon-near-zero metamaterials with gain media

Absorption in Metamaterials: Turning Loss into Gain

MIT Student 12 May 2010 ME 2.57: Nano-to-Macro Transport Processes Prof. Chen Absorption in Metamaterials: Turning Loss into Gain INTRODUCTION Nature has often served as inspiration for engineers. The setae of gecko feet are mimicked for climbing robots, the vivid coats of butterflies and peacocks motivate research in structural colors, and the streamline shapes of certain species of fish are i...