Nonreciprocal Metal-Dielectric Photonic Structures for Electromagnetic Isolation and Power Control
Abstract
This research project has developed RF composite materials which are capable of dramatically enhancing essential magnetophotonic responses, such as Faraday rotation, while drastically reducing absorption losses. The composites also provide qualitatively new features, unattainable from uniform magnetic materials, such as wide-aperture, omnidirectional isolation. The developed isolator design is based on a multilayered structure hosting a ferromagnetic nanolayer and a set of dichroic layers, which is so thin that the entire structure can be bent and used to cover a wide area with an arbitrary shape. The key structural elements, the ultra-thin Faraday rotator and absorptive sheet polarizers, have been successfully tested at X- and W-band frequencies. Furthermore, multilayered structures with phase-change components, such as vanadium dioxide, have been shown to perform as a reflecting photonic limiter in the W-band, transmitting low-intensity radiation while totally reflecting radiation with intensity exceeding a certain limiting threshold. In the developed multilayers, the limiting threshold for the forward propagating radiation can differ widely from that for the backward propagating wave.
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 07, 2019
- Accession Number
- AD1085873
Entities
People
- A. A. Chabanov
Organizations
- University of Texas at San Antonio