Fig. 6.

Nanomechanical modes of a stoichiometric SiN membrane measured with dark-field imaging. a–e Single-shot (acquisition time $\sim 10\mathrm{ms}$) measurements of mechanical modes at various frequencies while driving the membrane with PZT1. Pixels colored in dark red indicate high intensities and correspond to large values of squared mechanical displacement. f–j Calculated squared mechanical mode patterns with mode numbers (n, m). Modes (3, 5) and (5, 3) show nearly complete hybridization with $|\mathit{\beta }|\sim 1$