Innovation Sphere

Projects Sharing Researchers

Researchers

  • Gianluca Piazza
  • Siddhartha Ghosh

Communicate

Details

Project TitleELASTO-OPTIC MODULATOR INTEGRA TED IN HIGH FREQUENCY PIEZOELECTRIC MEMS RESONATOR
Track Code2016-088
Short DescriptionThe present invention is of an optical modulator that utilizes strain-based refractive index changes through the use of a piezoelectric MEMS resonator. The modulator is comprised of a photonic racetra
AbstractThe present invention is of an optical modulator that utilizes strain-based refractive index changes through the use of a piezoelectric MEMS resonator. The modulator is comprised of a photonic racetrack resonator made of a piezoelectric/photoelastic material, which is incorporated into the body of the MEMS resonator for mechanical strain to be transferred. The advantages of this type of modulator is that it may be integrated with RF MEMS devices and components on chip and also be scaled to high operational frequencies. Unlike present technologies among strain-based modulators, which primarily operate by launching a surface acoustic wave to interact with the optical cavity, this device makes use of laterally vibrating piezoelectric resonators. This design may be used to promote denser integration on chip, and be utilized in a variety of technologies for RF-Photonic applications that incorporate MEMS resonators and photonic integrated circuits. Also, in contrast with other types of optical modulators that involve physical displacements, the present design has an advantage in that its function does not significantly degrade if the device dimensions are modified to operate at a higher frequency due to the strain-based operation. This offers a more reliable interlace for electrically-controlled optical modulation in acousto-optic devices. The invention has been tested experimentally. The demonstration has been made with a monolithic AIN device of 400 nm thickness, but the design may be configured to operate at different frequencies in a variety of piezoelectric materials.
 
Tagselasto-optic effect, modulator, optical MEMS, piezoelectric resonator
 
Posted DateDec 16, 2016 1:15 PM

Researcher

Name
Gianluca Piazza
Siddhartha Ghosh

Manager

Name
David Graham