Fig. 1. Schematic of NV color center - cantilever nanomechanical system

Fig. 2. (a) Probe absorption as a function of detection-exciton frequency detuning for different mechanical oscillator frequencies; (b) Details of amplification for the left peaks of absorption spectra; (c) Details of amplification for the right peaks of absorption spectra

Fig. 3. (a) Detection absorption spectra obtained at different coupling intensity when the exciton-pumped light frequency detuning is equal to the oscillator frequency; (b) Relationship between the splitting width and coupling strength of the two peaks in detection absorption spectrum

Fig. 4. (a) Absorption spectra of the biomolecules to be measured with or without the presence of NV center-cantilever connected nanomechanical vibrators; (b) Frequency shift of the oscillator versus the number of nanoparticles