Development of Modular, Low-Cost Instrumentation for Cold Atom and Two-Dimensional Material Research

We report on the design and implementation of two modular, low-cost experimental platforms supporting quantum and nanoscale materials research. The first is a compact magneto-optical trap (MOT) system for laser cooling of rubidium atoms, constructed for approximately $5,000 using 3D-printed, open-source optomechanical components and custom control electronics for a 780 nm extended-cavity diode laser. The system achieves stable operation and reproducible alignment comparable to commercial traps. The second platform enables fabrication and characterization of two-dimensional material heterostructures, integrating custom-built transfer stages with scanning electron microscopy for precise layer assembly and inspection. Together, these systems demonstrate scalable, accessible instrumentation suitable for cold-atom physics and 2D material research, emphasizing modularity, reproducibility, and low-cost implementation.