Figure 4: Optically probed effective mass.
From: Cooling-by-measurement and mechanical state tomography via pulsed optomechanics
(a) Finite element simulations of the vibrational modes (no. 2, 4, 8 and 10) that have the four lowest optically probed effective masses. The displacements shown are exaggerated (blue to red indicates increasing displacement) and the outline indicates the cantilever rest position. The optically probed effective mass is given next to each mode number and underneath are the simulated mechanical frequencies in brackets and the measured frequencies. (b) Schematic of the cantilever and the focussed signal beam. The coordinate axis used when determining the optically probed effective mass is in the centre of the cantilever head on the mirror surface.
