On-chip frequency shifters in the gigahertz range (IMAGE)
Caption
In the top device, two coupled resonators form a figure eight-like structure. Input light travels from the waveguide through the resonators, entering as one color and emerging as another. The bottom device uses three coupled resonators: a small ring resonator, a long oval resonator called a racetrack resonator, and a rectangular-shaped resonator. As light speeds around the racetrack resonator, it cascades into higher and higher frequencies, resulting in a shift as high as 120 gigahertz.
Credit
Second Bay Studios/Harvard SEAS
Usage Restrictions
Credit must be given to the creator.
License
CC BY