The Painter Lab is a research group within the Applied Physics Department at the California Institute of Technology focusing on the physics and application of quantum photonic devices. Prof. Oskar Painter leads the group, which consists of a team of students and post-docs from both engineering and physics backgrounds. Research within the Painter Lab currently focuses on several inter-related topics — superconducting quantum circuits for quantum information processing and quantum simulation, the quantum physics of mesoscopic mechanical objects, hybrid superconducting and acoustic quantum circuits, and precision optomechanical sensors. We have facilities for optics and low temperature physics experiments, and also maintain a state-of-the-art nanofabrication facility for the in-house development of novel devices.