High Verdet Constant Polymer-Magnetic Nanoparticle Materials for Magneto-Optic Devices

Case ID:

Polymer-nanoparticle composite materials exhibit much higher Verdet constant performance than the currently-used inorganic metal oxide materials commonly referred to as "garnets," such as terbium gallium garnet (TGG). While TGG has a Verdet constant of around 2000-3000 degrees/Tesla meter, the inventive materials have achieved a Verdet constant of 2500-27,000 degrees/Tesla-meter, representing a 10x enhancement over state of the art TGG material. The inventive materials are also more easily and cheaply processed, than the crystal growth methods required for garnets.


Current high Verdet garnets are used for optical rotator-Faraday applications.



  • Optical isolaters, esp. for lasers
  • Optical circulators, esp. for fiber optic communications or sensors
  • Biomedical imaging



  • High Verdet constant
  • Able to tune Verdet performance
  • Low cost and facile processability
Patent Information:
Contact For More Information:
Jonathan Larson
Senior Licensing Manager, College of Science
The University of Arizona
Lead Inventor(s):
Dong-Chul Pyun
Robert Norwood