Measured Polarization Response of Negative Index Metamaterial

Abstract

Public reporting burden for this collection of information is estimatt. .,average 1 hour per response, including the time for reviewing instructiu,•., searching existing data sources, gathering and maintaining the data needed, and completing and reviewing this collection of information. Send comments regarding this burden estimate or any other aspect of this collection of information, including suggestions for reducing this burden to Department of Defense, Washington Headquarters Services, Directorate for Information Operations and Reports (0704-0188), 1215 Jefferson Davis Highway, Suite 1204, Arlington, VA 22202-4302. Respondents should be aware that notwithstanding any other provision of law, no person shall be subject to any penalty for failing to comply with a collection of information if it does not display a currently valid OMB control number. PLEASE DO NOT RETURN YOUR FORM TO THE ABOVE ADDRESS. REPORT DATE (DD-MM-YYYY)2 The geometrical anisotropy and bi-anisotropy of a split ring and post type metamaterial is studied by free space microwave measurements in a frequency band near 13.5 GHz where it exhibits negative index of refraction. The orientation of the linearly polarized incident wave determines whether the refracted response is negative or positive. Measurements of cross polarization through the prism are 50% of the co-polarization. The insertion loss through the material of 3.36 dB/cm at 13.5 GHz, where the index n = -1, is therefore composed of both scattering and absorptive losses. SUBJECT

Fabrication of a novel micron scale Y‐structure‐based chiral metamaterial: Simulation and experimental analysis of its chiral and negative index properties in the terahertz and microwave regimes

“…These extra transmissions could be attributed to the magnetoelectric coupling of the structure or an arrangement of the structures in the wedge structure. The same phenomenon was found when polarization rotation of the common split ring resonator and wire metamaterial (Smith et al, 2000) was investigated in free space experiments by Derov's group (Derov et al, 2006). Further study of this phenomenon is needed for a better understanding of the chiral negative refractive index metamaterials behavior.…”

Polarization properties of a 2‐D split ring resonator and rod type metamaterial lens

“…In applications such as lenses, where the effective properties depend on the interplay of SRRs and Rs, changes to the polarization state will not only effect the transmitted radiation but also manifest as concomitant loss, attributed to complex propagation mechanisms inside the lens . Furthermore, typical MW transmission measurements are performed with antennas polarized in parallel, thus any polarization rotation would appear as a transmission loss.…”

Polarization properties of a one dimensional metamaterial lens

“…Split ring resonator and rod (SRR+R) based lenses have been shown to exhibit unwanted cross polarization effects , chirality , and susceptibility to the polarization state of the incident radiation . For many applications, changes to the incident polarization state, attributed to complex propagation mechanisms inside the lens , pose a challenge to successful implementation as well as provide an opportunity for polarization dependent sensors. This article investigates the polarization properties of a 1D MTM lens and a comparison is made with the 2D MTM lens.…”