Tunable optical surfaces that are easy to integrate are crucial to many optoelectronic technologies in applications of optical interconnects, displays and projectors, optical information processing, and imaging devices. Currently available tunable optical components are often bulky, inefficient, and have limited response speeds. This thesis describes the design of compact, high-speed, programmable photonic devices based on two emerging material platforms including thin-film Pockels materials and the two-dimensional material graphene. In particular, a large-scale two-dimensional spatial light modulator (SLM) architecture with tunable microcavity arrays is proposed, analyzed, and numerically simulated, enabling an optimized design for a high-speed, high diffraction efficiency SLM with CMOS-compatible driving voltages. A graphene carrier density spatiotemporal modulation technique is also proposed and experimentally demonstrated. This technique enables the realization of a compact graphene thermopile in the mid-infrared wavelengths and paves the way for future implementations of graphene plasmonic metasurfaces.
Research supervisor: Prof. Dirk Englund
Committee: Prof. Tomas Palacios, Prof. Kevin O'Brien
Research laboratory: Quantum Photonics Laboratory
To attend this defense, please contact the doctoral candidate for the link:
cpeng at mit dot edu