Solid State Technology and Devices Seminar: Flat Photonics Using High Contrast Metastructures

Seminar | September 15 | 1-2 p.m. | Cory Hall, 521 Cory (Hogan Room)

 Professor Connie J. Chang-Hasnain, Electrical Engineering and Computer Science Department

 Electrical Engineering and Computer Sciences (EECS)

A new class of planar optics has emerged using near-wavelength dielectric structures, known as high contrast metastructures (HCM). Many extraordinary properties can be designed top-down based for integrated optics on a silicon or GaAs substrate. Using a 1D HCM as a high reflectivity mirror, we demonstrated wavelength-swept vertical cavity surface emitting lasers (VCSELs) with 1 MHz swept rate and the largest, continuous swept range. Such devices have applications for data communications, LIDAR and optical coherent tomography applications. A single layer HCM can also be designed as high quality-factor surface-normal resonators. I will review recent results using and its applications as biosensor, 4-wave generation, and spatial light modulator. Finally, we also demonstrated a novel design that mimics the color tuning effect of chameleon skin with color change achieved simultaneously in a multiple-color pattern flat structure., 510-642-3214