Quasimodes of a chaotic elastic cavity with increasing local losses
Quasimodes of a chaotic elastic cavity with increasing local losses
We report noninvasive measurements of the complex field of elastic quasimodes of a silicon wafer with chaotic shape. The amplitude and phase spatial distribution of the flexural modes are directly obtained by Fourier transform of time measurements. We investigate the crossover from real mode to complex-valued quasimode, when absorption is …