High index dielectric metasurfaces for enhanced magneto optics
Abstract
The magneto optical effect lies at the heart of many non reciprocal devices such as isolators and circulators. Since it is a very weak effect that linearly scales with the size of the magneto optic material, the resulting devices tend to be bulky. This makes free space applications cumbersome, but moreover precludes the realization of highly integrated, field deployable devices. Here, the PI proposes resonant metasurfaces to enhance the magneto optic effect in low loss dielectrics by several orders of magnitude. Furthermore, we endeavor to employ the insight from this proof of concept research to experimentally realize waveguide based on chip optical isolators. We will use analytically derived theoretical performance upper bounds to guide our research effort in order to obtain the best possible practical implementation in each instance. In a more explorative part of the proposed work, we plan to investigate the coupling between the magneto optical effect and chirality in order to obtain polarization insensitive asymmetric transmission and demonstrate magnetochiral metasurfaces for the first time. Successful realization of magneto optic and magnetochiral metasurfaces will not only allow for the exploration of the underlying fundamental physics but will also result in miniaturized devices such as optical isolators, current sensors, and circulators. Impact on DoD of this work includes the protection of optical systems from jamming attempts-laser attacks, enhanced LIDAR systems, current sensors, and improved ring laser gyroscopes that are used for navigation.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Jan 14, 2022
- Source ID
- FA95501910352
Entities
People
- Federico Capasso
Organizations
- Air Force Office of Scientific Research
- President and Fellows of Harvard College
- United States Air Force