We develop chalcogenide materials and processing techniques for optical and photonic applications.
In this area, we develop ways to process mid-IR compatible optical materials, in particular, highly photoresponsive and nonlinear chalcogenide glasses for integrated optical devices.
We implement solution processes to make mid-IR waveguides from chalcogenide glass. In contrast to etching-based methods, our solution-casting technique enables fabrication of microns-thick structures that match quantum cascade laser dimensions for on-chip integration. This technology leads the way to realizing compact and low-cost mid-IR laser-integrated devices for advanced chemical sensing.
Chalcogenide glasses are well known for their various photo-induced phenomena and have drawn great interests for their unique optical properties. We characterize the optical and structural properties of amorphous chalcogenide materials synthesized using a low-temperature, non-vacuum method of depositing As-S and Ge-Sb-S from organic solutions.