In this talk, I will highlight our recent advances in a mid-infrared detector based on phononic-crystal oscillators, achieving picowatt-per-root-hertz sensitivity while maintaining bandwidths exceeding 10 kHz. I will then discuss our frequency-domain analog computing approach based on nonlinear phononic devices. Finally, I will outline a vision for phononic integrated circuits as a unified and versatile platform for sensing, computation, and quantum information processing.
