Optomechanical Force Sensor: Displacement Noise Spectrum (2D)

This is the 2D counterpart to the 3D optomechanical force sensor scene, computing the identical noise-spectrum physics through a schematic cavity side-view and a live power spectral density chart instead of a rendered 3D scene. A nanobeam mirror closes one end of an optical cavity, turning its thermal and driven vibrations into a measurable displacement noise spectrum built from three independent sources — thermal Langevin noise, photon-shot-noise imprecision, and radiation-pressure back-action. Live readouts track the displacement and force sensitivity at resonance and how close the sensor sits to the standard quantum limit, plus sliders for the resonator's own mechanical Q and effective mass, the same trade-off that limits gravitational-wave mirrors and nano-mechanical single-molecule force sensors.