Chiyuan Yang

Design and develop optical metrology tools and techniques for AR waveguide combiners. Drive tool iterations from proof-of-concept to full automation. Optimize process pipelines for high throughput. Develop tools to characterize waveguide optical performance and conduct failure analysis. Create tools for nanostructure inspection in SRG waveguides. Implement automatic cosmetic defect detection.

Engaged in extensive research focused on characterizing the mechanical properties of van der Waals materials, such as graphite and niobium diselenide (NbSe2). Successfully designed and implemented a customized imaging system to capture spatial dynamics of nano-mechanical resonators (NMR). Integrated a Fabry-Perot interferometer cavity into the optical setup, enabling the identification of thin film spatial dynamics beyond the diffraction limit. The system boasts the capability to resolve eigenmodes of NMR with a displacement on the order of a few picometers (10-12 m). This work has resulted in the publication of four research papers. Additionally, the developed imaging platform holds significant potential for expediting the characterization of 2D materials, contributing to advancements in quantum computing and communication.

Conduct studies on phonon dynamics in complex oxides. Utilize time-domain pump-probe spectroscopy to generate, detect, and manipulate coherent phonons in perovskite oxides (SrTiO3, SrRuO3, SrIrO3). Establish a platform for THz spectroscopy investigations. Focus on phonon-phonon interactions and phonon attenuation in the GHz-THz regime. Develop models and simulations to explain phonon behavior.