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

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.

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

Applications:

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

Advantages:

• High Verdet constant
• Able to tune Verdet performance
• Low cost and facile processability