Dataset for: arXiv:2101.09003, Thermal noise of a cryo-cooled silicon cantilever locally heated up to its melting point

The .fig (MATLAB) files correspond to the figures 2c, 3a, 3b, 4a, 4b, 5.

The "data.mat" (MATLAB) file contains the raw data of the experiment for two measurement sessions, named Day1 and Day2. For each set we present:

The list of the laser powers used in the experiment, in the form equilibrium (around 1 mW) - non equilibrium (30 mW) - equilibrium (1mW) - non equilibrium (20 mW)... [e.g. Day1_Powers].

The average temperature of the cryostat at each power [e.g. Day1_Tmin].

An example of the Power Spectrum Density (PSD) at each power, with the corresponding frequency list. [e.g. Day1_PSD,Day1_F]

The totality of the spectra at each power for each resonance mode, in a frequency interval around the resonance, divided into deflection (D_) and torsion (T_) [e.g. Day1_T_PSD, Day1_T_F]. The data are presented in a matrix of the form: (power step x measured spectrum x frequency interval x mode number). Discussing them separately:

The power of each power step is contained in the Day1_Powers list.

The measured spectrum index indicates the measured spectra at given power. This number varies at each power, thus the length of this matrix dimension is set at a maximal value and filled with the available spectra, the other entries being set to "NaN". 

The frequency list (centered around the resonance frequency) has a constant length of around 1000 points for each resonance mode.

The measured modes are up to 9 for deflection and 7 for torsion. Flexural mode 1 is polluted, flexural and torsional mode 5 is not measured due to the probing point being on a node, therefore these entries are set to "Nan". Furthermore, in Day1 we did not measure flexural modes 8 and 9 and torsional modes 6 and 7, which are also set to "NaN" for this set. 

An example is: the 3rd measured spectrum around the 9th flexural resonance at the 2nd power in the list Day1_Powers is: Day1_D_PSD( 2 , 3 , : , 9).